LET Reviewer in BIOLOGICAL SCIENCE Set 2

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b><br /></b><div><b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /><div>1. Which of the following is not a characteristic of prokaryotic cells?</div><div><div>a) Lack of membrane-bound organelles</div><div>b) Presence of a cell wall</div><div>c) Presence of a nucleus</div><div>d) Presence of ribosomes</div><div>Answer: c) Presence of a nucleus</div><div><br /></div><div>2. What is the main difference between mitosis and meiosis?</div><div>a) Mitosis results in two identical daughter cells, while meiosis results in four genetically different daughter cells.</div><div>b) Mitosis results in four genetically different daughter cells, while meiosis results in two identical daughter cells.</div><div>c) Mitosis is the process of cell division in somatic cells, while meiosis is the process of cell division in germ cells.</div><div>d) Mitosis results in haploid daughter cells, while meiosis results in diploid daughter cells.</div><div>Answer: a) Mitosis results in two identical daughter cells, while meiosis results in four genetically different daughter cells.</div><div><br /></div><div>3. What is the process of converting atmospheric nitrogen into a usable form for plants and animals called?</div><div>a) Nitrification</div><div>b) Denitrification</div><div>c) Nitrogen fixation</div><div>d) Nitrogen assimilation</div><div>Answer: c) Nitrogen fixation</div><div><br /></div><div>4. Which of the following is not a function of the liver?</div><div>a) Production of bile</div><div>b) Regulation of blood glucose levels</div><div>c) Production of insulin</div><div>d) Detoxification of harmful substances</div><div>Answer: c) Production of insulin</div><div><br /></div><div>5. Which of the following is not a type of muscle tissue?</div><div>a) Skeletal muscle</div><div>b) Smooth muscle</div><div>c) Cardiac muscle</div><div>d) Adipose tissue</div><div>Answer: d) Adipose tissue</div><div><br /></div><div>6. Which of the following is not a component of the scientific method?</div><div>a) Formulation of a hypothesis</div><div>b) Designing an experiment</div><div>c) Analyzing data</div><div>d) Confirmation bias</div><div>Answer: d) Confirmation bias</div><div><br /></div><div>7. Which of the following is not a function of the lymphatic system?</div><div>a) Production of red blood cells</div><div>b) Transport of excess fluid from tissues to the circulatory system</div><div>c) Absorption of dietary fats</div><div>d) Defense against pathogens</div><div>Answer: a) Production of red blood cells</div><div><br /></div><div>8. Which of the following is not a type of RNA?</div><div>a) Messenger RNA (mRNA)</div><div>b) Transfer RNA (tRNA)</div><div>c) Ribosomal RNA (rRNA)</div><div>d) Deoxyribonucleic acid (DNA)</div><div>Answer: d) Deoxyribonucleic acid (DNA)</div><div><br /></div><div>9. Which of the following is not a principle of natural selection?</div><div>a) Variation exists within populations</div><div>b) Individuals with advantageous traits are more likely to survive and reproduce</div><div>c) Evolution occurs through the inheritance of acquired characteristics</div><div>d) Over time, populations can become adapted to their environment</div><div>Answer: c) Evolution occurs through the inheritance of acquired characteristics</div><div><br /></div><div>10. Which of the following is not a component of the central nervous system?</div><div>a) Brain</div><div>b) Spinal cord</div><div>c) Peripheral nerves</div><div>d) Optic nerve</div><div>Answer: c) Peripheral nerves</div><div><br /></div><div>11. Which of the following is not a type of ecological interaction between organisms?</div><div>a) Competition</div><div>b) Mutualism</div><div>c) Parasitism</div><div>d) Conformity</div><div>Answer: d) Conformity</div><div><br /></div><div>12. What is the process by which cells convert glucose into ATP called?</div><div>a) Fermentation</div><div>b) Glycolysis</div><div>c) Krebs cycle</div><div>d) Electron transport chain</div><div>Answer: b) Glycolysis</div><div><br /></div><div>13. Which of the following is not a type of white blood cell?</div><div>a) Neutrophil</div><div>b) Erythrocyte</div><div>c) Lymphocyte</div><div>d) Monocyte</div><div>Answer: b) Erythrocyte</div><div><br /></div><div>14. Which of the following is a type of RNA molecule that plays a role in regulating gene expression by binding to messenger RNA (mRNA) and preventing its translation into protein?</div><div>a) Transfer RNA (tRNA)</div><div>b) Ribosomal RNA (rRNA)</div><div>c) MicroRNA (miRNA)</div><div>d) Small nuclear RNA (snRNA)</div><div>Answer: c) MicroRNA (miRNA)</div><div><br /></div><div>15. What is the process by which prokaryotic cells transfer genetic material between each other called?</div><div>a) Mitosis</div><div>b) Meiosis</div><div>c) Conjugation</div><div>d) Transcription</div><div>Answer: c) Conjugation</div><div><br /></div><div>16. Which of the following is a type of muscle fiber that is responsible for prolonged, sustained contractions and is found in postural muscles such as those in the back?</div><div>a) Type I (slow-twitch) fibers</div><div>b) Type IIa (fast-twitch oxidative) fibers</div><div>c) Type IIb (fast-twitch glycolytic) fibers</div><div>d) Type III (intermediate) fibers</div><div>Answer: a) Type I (slow-twitch) fibers</div><div><br /></div><div>17. What is the process by which plants convert light energy into chemical energy in the form of glucose called?</div><div>a) Respiration</div><div>b) Photosynthesis</div><div>c) Fermentation</div><div>d) Oxidative phosphorylation</div><div>Answer: b) Photosynthesis</div><div><br /></div><div>18. Which of the following is a type of cell junction that forms a barrier between cells and prevents the movement of substances between them?</div><div>a) Tight junctions</div><div>b) Gap junctions</div><div>c) Desmosomes</div><div>d) Plasmodesmata</div><div>Answer: a) Tight junctions</div><div><br /></div><div>19. What is the process by which the DNA sequence of a gene is used to direct the synthesis of a protein called?</div><div>a) Transcription</div><div>b) Translation</div><div>c) Replication</div><div>d) Recombination</div><div>Answer: b) Translation</div><div><br /></div><div>20. Which of the following is a type of symbiotic relationship in which one species benefits and the other is neither helped nor harmed?</div><div>a) Mutualism</div><div>b) Commensalism</div><div>c) Parasitism</div><div>d) Predation</div><div>Answer: b) Commensalism</div><div><br /></div><div>21. Which of the following is a type of nitrogenous waste product that is excreted by birds and reptiles?</div><div>a) Ammonia</div><div>b) Urea</div><div>c) Uric acid</div><div>d) Creatinine</div><div>Answer: c) Uric acid</div><div><br /></div><div>22. Which of the following is not a function of the respiratory system?</div><div>a) Exchange of gases between the air and blood</div><div>b) Regulation of blood pH</div><div>c) Production of hormones</div><div>d) Defense against pathogens</div><div>Answer: c) Production of hormones</div><div><br /></div><div>23. Which of the following is a type of cell division that results in the production of four genetically diverse daughter cells and is used in the production of sperm and egg cells?</div><div>a) Mitosis</div><div>b) Meiosis</div><div>c) Binary fission</div><div>d) Budding</div><div>Answer: b) Meiosis</div><div><br /></div><div>24. Which of the following is a type of membrane-bound organelle that is responsible for breaking down cellular waste products and foreign substances?</div><div>a) Lysosome</div><div>b) Mitochondrion</div><div>c) Chloroplast</div><div>d) Peroxisome</div><div>Answer: a) Lysosome</div><div><br /></div><div>25. Which of the following is a type of ecological succession that occurs on a previously uninhabited substrate, such as a newly formed volcanic island or a glacier retreat?</div><div>a) Primary succession</div><div>b) Secondary succession</div><div>c) Pioneer succession</div><div>d) Climax succession</div><div>Answer: a) Primary succession</div></div></div>

LET Reviewer in BIOLOGICAL SCIENCE Set 2

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 1. Which of the following is not a c...

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LET Reviewer in BIOLOGICAL SCIENCE Set 1

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b><br /></b><div><b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> <div>1. Which of the following is not a type of RNA?</div><div><div>a) Messenger RNA (mRNA)</div><div>b) Transfer RNA (tRNA)</div><div>c) Ribosomal RNA (rRNA)</div><div>d) Deoxyribonucleic acid (DNA)</div><div>Answer: d) Deoxyribonucleic acid (DNA)</div><div><br /></div><div>2. Which of the following is an example of a monosaccharide?</div><div>a) Glucose</div><div>b) Sucrose</div><div>c) Starch</div><div>d) Cellulose</div><div>Answer: a) Glucose</div><div><br /></div><div>3. Which of the following is not a characteristic of prokaryotic cells?</div><div>a) They lack a nucleus</div><div>b) They are typically smaller in size compared to eukaryotic cells</div><div>c) They have membrane-bound organelles</div><div>d) They have a cell wall</div><div>Answer: c) They have membrane-bound organelles</div><div><br /></div><div>4. Which of the following is a function of the mitochondria?</div><div>a) Protein synthesis</div><div>b) Storage of genetic information</div><div>c) Production of ATP</div><div>d) Transport of substances within the cell</div><div>Answer: c) Production of ATP</div><div><br /></div><div>5. Which of the following is not a function of the liver?</div><div>a) Production of bile</div><div>b) Detoxification of harmful substances</div><div>c) Regulation of blood sugar levels</div><div>d) Transport of oxygen to the body's tissues</div><div>Answer: d) Transport of oxygen to the body's tissues</div><div><br /></div><div>6. Which of the following is a characteristic of a dominant allele?</div><div>a) It is always expressed in the phenotype</div><div>b) It is only expressed in the homozygous state</div><div>c) It is masked by a recessive allele</div><div>d) It is more common in the population</div><div>Answer: a) It is always expressed in the phenotype</div><div><br /></div><div>7. Which of the following is a type of cell division that results in the formation of two identical daughter cells?</div><div>a) Meiosis</div><div>b) Mitosis</div><div>c) Both a and b</div><div>d) Neither a nor b</div><div>Answer: b) Mitosis</div><div><br /></div><div>8. Which of the following is not a type of tissue in the human body?</div><div>a) Epithelial tissue</div><div>b) Muscle tissue</div><div>c) Nerve tissue</div><div>d) Digestive tissue</div><div>Answer: d) Digestive tissue</div></div><div><br /></div><div><div>9. Which of the following is the site of protein synthesis in a eukaryotic cell?</div><div>a) Ribosome</div><div>b) Endoplasmic reticulum</div><div>c) Golgi apparatus</div><div>d) Nucleus</div><div>Answer: a) Ribosome</div><div><br /></div><div>10. Which of the following is the process by which green plants and some other organisms convert light energy into chemical energy?</div><div>a) Respiration</div><div>b) Fermentation</div><div>c) Photosynthesis</div><div>d) Oxidation</div><div>Answer: c) Photosynthesis</div><div><br /></div><div>11. Which of the following is a process by which water is transported through a plant?</div><div>a) Transpiration</div><div>b) Photosynthesis</div><div>c) Respiration</div><div>d) Digestion</div><div>Answer: a) Transpiration</div><div><br /></div><div>12. Which of the following is not a function of the respiratory system?</div><div>a) Gas exchange</div><div>b) Regulation of body temperature</div><div>c) Acid-base balance</div><div>d) Sense of smell</div><div>Answer: b) Regulation of body temperature</div><div><br /></div><div>13. Which of the following is a structure that prevents the backflow of blood in veins?</div><div>a) Capillary</div><div>b) Artery</div><div>c) Venule</div><div>d) Valve</div><div>Answer: d) Valve</div><div><br /></div><div>14. Which of the following is a type of connective tissue that provides support and flexibility to the body?</div><div>a) Bone</div><div>b) Muscle</div><div>c) Nerve</div><div>d) Blood</div><div>Answer: a) Bone</div><div><br /></div><div>15. Which of the following is a type of muscle tissue that is responsible for involuntary movements?</div><div>a) Skeletal muscle</div><div>b) Smooth muscle</div><div>c) Cardiac muscle</div><div>d) None of the above</div><div>Answer: b) Smooth muscle</div><div><br /></div><div>16. Which of the following is a type of sensory receptor that is responsible for detecting light?</div><div>a) Thermoreceptor</div><div>b) Photoreceptor</div><div>c) Chemoreceptor</div><div>d) Mechanoreceptor</div><div>Answer: b) Photoreceptor</div><div><br /></div><div>17. Which of the following is a type of neurotransmitter that is responsible for transmitting signals in the nervous system?</div><div>a) Insulin</div><div>b) Serotonin</div><div>c) Glucagon</div><div>d) Adrenaline</div><div>Answer: b) Serotonin</div><div><br /></div><div>18. Which of the following is a type of hormone that is produced by the adrenal gland and helps the body respond to stress?</div><div>a) Estrogen</div><div>b) Progesterone</div><div>c) Testosterone</div><div>d) Cortisol</div><div>Answer: d) Cortisol</div><div><br /></div><div>19. Which of the following is a type of white blood cell that is responsible for fighting infections?</div><div>a) Neutrophil</div><div>b) Erythrocyte</div><div>c) Platelet</div><div>d) Lymphocyte</div><div>Answer: a) Neutrophil</div><div><br /></div><div>20. Which of the following is a type of gland that secretes hormones directly into the bloodstream?</div><div>a) Exocrine gland</div><div>b) Endocrine gland</div><div>c) Sebaceous gland</div><div>d) Sweat gland</div><div>Answer: b) Endocrine gland</div><div><br /></div><div>21. Which of the following is a process by which a cell engulfs a large particle or another cell?</div><div>a) Endocytosis</div><div>b) Exocytosis</div><div>c) Phagocytosis</div><div>d) Pinocytosis</div><div>Answer: c) Phagocytosis</div><div><br /></div><div>22. Which of the following is a type of symbiotic relationship in which one species benefits and the other is neither helped nor harmed?</div><div>a) Commensalism</div><div>b) Mutualism</div><div>c) Parasitism</div><div>d) Predation</div><div>Answer: a) Commensalism</div></div><div><br /></div><div><div>23. Which of the following is the correct sequence of events during mitosis?</div><div>a) Prophase, metaphase, anaphase, telophase</div><div>b) Prophase, anaphase, metaphase, telophase</div><div>c) Metaphase, prophase, anaphase, telophase</div><div>d) Metaphase, anaphase, prophase, telophase</div><div>Answer: a) Prophase, metaphase, anaphase, telophase</div><div><br /></div><div>24. Which of the following is a type of feedback mechanism that is involved in the regulation of blood sugar levels in the body?</div><div>a) Positive feedback</div><div>b) Negative feedback</div><div>c) Both positive and negative feedback</div><div>d) Neither positive nor negative feedback</div><div>Answer: b) Negative feedback</div><div><br /></div><div>25. Which of the following is a process by which cells differentiate into different types of cells during embryonic development?</div><div>a) Mitosis</div><div>b) Meiosis</div><div>c) Apoptosis</div><div>d) Cell specialization</div><div>Answer: d) Cell specialization</div></div></div>

LET Reviewer in BIOLOGICAL SCIENCE Set 1

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 1. Which of the following is not a...

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LET Reviewer in BIOLOGICAL SCIENCE Part 12

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> 51. The sea urchin’s body is organized around the organism’s center, like the spokes of a wheel. What kind of symmetry does the sea urchin have?<br /> a. bilateral<br /> b. radial<br /> c. asymmetrical<br /> d. unilateral<br /> <br /> 53. Most vertebrates reproduce sexually. When does fertilization occur in sexual reproduction?<br /> a. when a male animal releases sperm and a female animal releases eggs<br /> b. when part of an organism breaks off and begins to grow independently<br /> c. when the cells of an embryo begin to differentiate and become specialized<br /> d. when the nucleus of a sperm cell fuses with the nucleus of an egg cell<br /> <br /> 54. Which of the following is a difference between invertebrates and vertebrates?<br /> a. Vertebrates have exoskeletons, and invertebrates have endoskeletons.<br /> b. Invertebrates reproduce only asexually, vertebrates only reproduce sexually.<br /> c. Vertebrates have a backbone, while invertebrates do not.<br /> d. Invertebrates have bilateral symmetry, while vertebrates have radial symmetry.<br /> <br /> 55. Which of the following is a function of the reproductive system?<br /> a. to produce all the body’s hormones<br /> b. to regulate the body temperature<br /> c. to make the hormones that fight disease<br /> d. to regulate the development of male and female characteristics<br /> <br /> 56. The animal phylum that contains the largest number of different species is the<br /> a. echinoderms<br /> b. chordates<br /> c. arthropods<br /> d. roundworms<br /> <br /> 57. A hydra, which has two layers of body cells, is<br /> a. a coelenterate<br /> b. a flagellate<br /> c. an echinoderm<br /> d. a porifera<br /> <br /> 58. Unlike amphibians, reptiles<br /> a. are covered with scales<br /> b. have a circulatory system<br /> c. are cold – blooded<br /> d. lays eggs<br /> <br /> 59. Both an octopus and a clam are<br /> a. arachnids<br /> b. crustaceans<br /> c. tunicates<br /> d. molluscs<br /> <br /> 60. A fruit is a _________.<br /> a. ripened ovule<br /> b. ripened ovary<br /> c. ripened bud<br /> d. ripened stigma<br /> <br /> 61. An imperfect flower is one that lacks either _________.<br /> a. sepals or petals<br /> b. stamens or pistils<br /> c. petals or stamens<br /> d. pistils or sepals<br /> <br /> 62. Pollination is the ________.<br /> a. union of a person nucleus with an egg nucleus<br /> b. growth of a pollen tube in a style<br /> c. penetration of an embryo sac by a pollen tube<br /> d. transfer of pollen grains from an anther to a stigma<br /> <br /> 63. The protist which can cause malaria when transmitted by the bite of the female anopheles mosquito is ________.<br /> a. Plasmodium falcifarum<br /> b. Plasmodium ovale<br /> c. Plasmodium vivax<br /> d. Plasmodium<br /> <br /> 64. The arthropod which is an arachnid is the ________.<br /> a. butterfly<br /> b. spider<br /> c. beetle<br /> d. cockroach<br /> <br /> 65. The squid belongs to phylum ________.<br /> a. Chordata<br /> b. Mollusca<br /> c. Echinodermata<br /> d. Nemathelminthes<br /> <br /> 66. A dinner in a seafood restaurant includes clams, squid, and tuna. What phyla are represented?<br /> a. porifera and mollusc<br /> b. cnidaria and chordate<br /> c. mollusca and chordate<br /> d. mollusca and arthropoda<br /> <br /> 67. The body temperature of cold – blooded animals<br /> a. is 10 deg. C<br /> b. is 100 deg. C<br /> c. changes with the environment<br /> d. remains constant<br /> <br /> 68. Each of the following is a primate except a<br /> a. tarsier<br /> b. gorilla<br /> c. kangaroo<br /> d. human<br /> <br /> 69. Development from a fertilized egg to adult may occur in either two ways. What do you call animals that are born resembling adults of the species, just like man?<br /> a. viviparous<br /> b. oviparous<br /> c. ovoviviparous<br /> d. none of them<br /> <br /> 70. Vivian and Carlo are two amateur fossils hunters, who were unable to unearth a complete fossil of mammals. How could they determine whether it was a herbivore, carnivore, or omnivore?<br /> a. based on the skull<br /> b. based on the type of teeth<br /> c. based on the phalanges<br /> d. based on the vertebral column<br /> <br /> 71. Amphibians have adaptations that protect them from very cold and very warm temperatures. During the cold winter months they become inactive. They bury themselves in mud until the temperature warms up. What do you call the period of inactivity during winter?<br /> a. hibernation<br /> b. aestivation<br /> c. incubation<br /> d. adaptation<br /> <br /> 72. Amoeba proteus is a very common amoeba that you use in the laboratory for experiments. You have probably observed their mode of motility. What do they use for locomotion?<br /> a. cilia<br /> b. flagella<br /> c. pseudopodia<br /> d. feet<br /> <br /> 73. What is the relationship between the cattle and the bacteria and protozoa living within their stomachs?<br /> a. parasitism<br /> b. commensalism<br /> c. mutualism<br /> d. predation<br /> <br /> 74. What is formed when two or more groups of different organisms live together and interact with each other in the same area?<br /> a. community<br /> b. population<br /> c. niche<br /> d. ecosystem<br /> <br /> 75. A green alga provides a fungus with nutrients and water. The fungus protects the alga from the sun and high temperatures. What relationship is illustrated in the given example?<br /> a. parasitism<br /> b. commensalism<br /> c. mutualism<br /> d. predation<br /> <br /> 76. Which is an example of a renewable energy source?<br /> a. oil<br /> b. natural gas<br /> c. solar power<br /> d. coal<br /> <br /> 77. Which is a source of biomass energy?<br /> a. water<br /> b. wind<br /> c. geysers<br /> d. plants<br /> <br /> 78. Which of the following refers to commensalism?<br /> a. both organisms benefit<br /> b. both organisms are harmed<br /> c. one organism benefits and the other is harmed<br /> d. one organism benefits and the other is unaffected<br /> <br /> 79. What ecological structure is formed by a group of individuals of the same species living together in the same area?<br /> a. niche<br /> b. community<br /> c. population<br /> d. ecosystem<br /> <br /> 80. All members of a group stem from a common ancestor and are capable of interbreeding. The taxonomy category referred to here is _______.<br /> a. class<br /> b. order<br /> c. species<br /> d. family<br /> <br /> 81. Which of the following is an abiotic factor that may affect the types and numbers of animals that live in an area?<br /> a. the range of temperatures experienced in the area<br /> b. the types of plants available for food sources<br /> c. the number and types of predators in the area<br /> d. the number of plants available for food sources<br /> <br /> 82. What do you call animals that feed on both plant and meat?<br /> a. herbivores<br /> b. carnivores<br /> c. omnivores<br /> d. insectivores<br /> <br /> 83. After drinking dirty water, a student developed bloody diarrhea and liver problems in a few weeks later. Which of the following is the most likely cause of the disease?<br /> a. paramecium<br /> b. dinoflagellates<br /> c. amoeba<br /> d. euglena<br /> <br /> 84. Chemical produced by some bacteria that can kill or weaken other bacteria<br /> a. antitoxins<br /> b. antibodies<br /> c. antibiotics<br /> d. antiseptic<br /> <br /> 85. At what stages in its life cycle is a butterfly most active?<br /> a. egg and larva<br /> b. larva and adult<br /> c. pupa and adult<br /> d. adult and egg<br /> <br /> 85. Insecticides are used to control insect populations so that they do not destroy crops. However, over time, a new insecticide has to be developed as they become less effective in killing the insects. Why?<br /> a. Insecticides build up in the soil.<br /> b. Insecticides are concentrated at the bottom of the food chain<br /> c. Surviving insects pass their resistance to insecticides to their offspring.<br /> d. Surviving insects have learned to include insecticides as a food source.<br /> <br /> 86. Not all organisms are harmful. Which of these is done by yeast?<br /> a. encourage disease food<br /> b. cause milk to become cheese<br /> c. cause Yakult to be milky<br /> d. Promotes the rising of bread for baking<br /> <br /> 87. Which of the following organisms is used to convert milk to cheese?<br /> a. bacteria<br /> b. protozoa<br /> c. virus<br /> d. algae<br /> <br /> 88. Why is it not quite possible for viruses to live and multiply in the outer layers of our skin?<br /> a. The outer layer of the skin has dead cells only<br /> b. The outer layer of the skin has oil which is harmful to viruses.<br /> c. The outer layer of the skin has a lower temperature unsuitable for viruses.<br /> d. The outer layer of the skin has salt from perspiration which is harmful to viruses<br /> <br /> 89. Young people stand straight. Very old ones usually stoop. Why?<br /> e. Sedentary lives of the old.<br /> f. Habit of stooping developed in the old.<br /> g. Greater gravitational pull on the old than on the young.<br /> h. Bones of the old have become weak and soft and their joints become loose.<br /> <br /> 90. Which of the following factors contribute to “greenhouse effect”?<br /> a. destruction of the forests<br /> b. use of carbon dioxide by land plants<br /> c. depletion of minerals in the soil by overfarming<br /> d. use of solar glass panels to capture radiant energy<br /> <br /> 91. Angiosperms are also known as<br /> a. cone bearing<br /> b. seed bearing<br /> c. flower bearing<br /> d. spore bearing<br /> <br /> 92. Some animals have the ability to produce a lost body part such as lizard, starfish, and brittle star. This method is known as<br /> a. regeneration<br /> b. fragmentation<br /> c. budding<br /> d. fission<br /> <br /> 93. Metamorphosis is the change in structure from a larva to an adult. The following animals follow definite stages in their life cycle except<br /> a. fly<br /> b. frog<br /> c. butterfly<br /> d. turtle<br /> <br /> 94. One of the principal causes of acid rain is<br /> a. Waste and acid from chemical factories being pumped into rivers.<br /> b. Acid from chemical laboratories evaporating into the air.<br /> c. Gases from burning coal and oil dissolving in water in the atmosphere.<br /> d. Gases from air conditioner and refrigerators escaping into the atmosphere.<br /> <br /> 95. While observing some plants, a student notices some very small plants found attached on rocks. The plants most likely belong to<br /> a. angiosperms<br /> b. gymnosperms<br /> c. tracheophytes<br /> d. bryophytes<br /> <br /> 96. A certain plant with needle – like leaves and cone – bearing usually grow and reproduce in cold places. What is the classification of this plant?<br /> a. angiosperms<br /> b. gymnosperms<br /> c. bryophytes<br /> d. monocots<br /> <br /> 97. This is an offshoot of water pollution resulting from an accumulation of phosphates and nitrates from waste materials, detergents, and fertilizers. What is this phenomenon that kills aquatic life?<br /> a. acid rain<br /> b. eutrophication<br /> c. dynamite fishing<br /> d. cyanide fishing<br /> <br /> 98. Animals are grouped based on their structural similarities. Identify which pair of animals is closely related.<br /> a. snake and toad<br /> b. whale and shark<br /> c. bat and monkey<br /> d. salamander and turtle<br /> <br /> 99. The following practices promote sustainable development except<br /> a. reforestation<br /> b. recycling<br /> c. selective hunting<br /> d. cyanide fishing<br /> <br /> 100. Ant returning from a new food source marks a trail for other ants to follow. This chemical signal is called<br /> a. hormones<br /> b. enzymes<br /> c. catalyst<br /> d. pheromones<br /> <div> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://adf.ly/1F5oP3" target="_blank"><img alt="Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1-NjrpCxm6yjAbseWXzXAju2YTydqeOqudQCUdc7hgym5LtE20MCn25TSOjZjV02OCrkKMexBzS7VQClWlabKvR8YlX_gPz4idqAXShssWs9hSM6-Ym3HgwW1V7JJHMyE-X79QK0-KbTU/s1600/dl.png" /></a></div>

LET Reviewer in BIOLOGICAL SCIENCE Part 12

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 51. The sea urchin’s body is organi...

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LET Reviewer in BIOLOGICAL SCIENCE Part 11

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> 1. As green plants make food, they are<br /> a. first – order consumers<br /> b. second – order consumers<br /> c. decomposers<br /> d. producers<br /> <br /> 2. The producers in a pond are usually<br /> a. tadpoles<br /> b. algae<br /> c. bacteria<br /> d. small fish<br /> <br /> 3. A series in which each organism serves as food for the next organism is a<br /> a. food chain<br /> b. population<br /> c. community<br /> d. niche<br /> <br /> 4. Substances from dead plants and animals are returned to the water by<br /> a. producers<br /> b. consumers<br /> c. decomposers<br /> d. top consumers<br /> <br /> 5. The special role of each organism in a food pyramid is its<br /> a. system<br /> b. niche<br /> c. physical environment<br /> d. community<br /> <br /> 6. The consumers in a food chain in a pond are the<br /> a. algae<br /> b. plants<br /> c. bacteria<br /> d. animals<br /> <br /> 7. If you study how a fish is fitted for life in a quiet water, you are studying its<br /> a. food pyramid<br /> b. adaptation<br /> c. interdependence<br /> d. population<br /> <br /> 8. All the plants and animals in a pond form<br /> a. an environment<br /> b. a community<br /> c. a population<br /> d. an ecosystem<br /> <br /> 9. Many interdependent food chains in a forest make up a<br /> a. food pyramid<br /> b. pyramid of biomass<br /> c. food web<br /> d. habitat<br /> <br /> 10. The second – order consumers in a food pyramid get their food directly from<br /> a. carnivores<br /> b. decomposers<br /> c. producers<br /> d. herbivores<br /> <br /> 11. All the plants and animals on earth<br /> a. create new matter<br /> b. recycle the same matter<br /> c. create new energy<br /> d. recycle the same energy<br /> <br /> 12. An animal’s heartbeat and breathing are slowed down when it<br /> a. enters a habitat<br /> b. hunts for food<br /> c. occupies a niche<br /> d. hibernates<br /> <br /> 13. If you catch a fish and eat it, you may be<br /> a. a first – order consumer<br /> b. a second – order consumer<br /> c. a decomposer<br /> d. a scavenger<br /> <br /> 14. The part of sunlight absorbed most rapidly by water is<br /> a. red light<br /> b. blue light<br /> c. violet light<br /> d. green light<br /> <br /> 15. The increased effect of a pesticide on organisms that feed on each other in a lake is called<br /> a. biological conservation<br /> b. biological magnification<br /> c. eutrophication<br /> d. nitrification<br /> <br /> 16. Plants and animals in the same ecosystem usually have similar<br /> a. shapes<br /> b. sizes<br /> c. ways of obtaining food<br /> d. environmental needs<br /> <br /> 17. Which of the following refers to a secondary carnivore?<br /> a. eats only plants<br /> b. gets energy directly from the sun<br /> a. gets energy through photosynthesis<br /> b. has less food energy available to it than consumers at lower tropic levels<br /> <br /> 18. Which of the following statements is true regarding a food chain?<br /> a. there are more herbivores than carnivores<br /> b. each higher trophic level has more energy available to it<br /> c. the number of organism at each trophic level is not related to energy<br /> d. the biomass of third – order consumers is greater than the biomass of second – order consumers<br /> <br /> 19. Which of the following is the result of biological magnification?<br /> a. energy is lost at each trophic level of the food chain<br /> b. the greenhouse effect will be most significant at the poles<br /> c. top – level predators may be most harmed by toxic environmental chemicals<br /> d. DDT has spread throughout the ecosystem and is found in almost every organism<br /> <br /> 20. Why are green plants considered autotrophs?<br /> a. They have many pigments that capture light.<br /> b. They can build simple inorganic substances into complex organic substance.<br /> c. They can build any kind of substances.<br /> d. They depend on other sources for their food.<br /> <br /> 21. In what trophic level of the food pyramid are consumers greatest in number?<br /> a. first trophic<br /> b. second trophic<br /> c. third trophic<br /> d. fourth trophic<br /> <br /> 22. In a pond or desert, light, warmth, water, minerals, carbon dioxide, and oxygen make up the<br /> a. ecosystem<br /> b. community<br /> c. population<br /> d. physical environment<br /> <br /> 23. Why do most plants look green?<br /> a. The chlorophyll in plants captures green light for photosynthesis.<br /> b. The chlorophyll in plants reflects wavelengths of green light.<br /> c. The chloroplasts in plants are surrounded by two green membranes.<br /> d. The chloroplasts in plants make green sugar during photosynthesis.<br /> <br /> 24. Green plants make glucose from<br /> a. water and carbon dioxide<br /> b. chlorophyll and sunlight<br /> c. water and oxygen<br /> d. oxygen and carbon dioxide<br /> <br /> 25. A male structure in the flowering plant is the<br /> a. ovary<br /> b. ovule<br /> c. pistil<br /> d. stamen<br /> <br /> 26. Transfer of pollen from the stamen of one flower to the pistil of another is<br /> a. fertilization<br /> b. cross – pollination<br /> c. self – pollination<br /> d. reproduction<br /> <br /> 27. Cuttings and graftings are examples of<br /> a. adaptation<br /> b. fertilization<br /> c. vegetative propagation<br /> d. seed dispersal<br /> <br /> 28. Both gymnosperms and angiosperms<br /> a. produce flowers<br /> b. produce seeds<br /> c. have needle – like leaves<br /> d. lose all their leaves in the fall<br /> <br /> 29. Water and minerals are carried upward in plant stems in the<br /> a. phloem<br /> b. xylem<br /> c. guard cells<br /> d. stomata<br /> <br /> 30. Vegetative reproduction is a form of<br /> a. pollination<br /> b. seed dispersal<br /> c. sexual reproduction<br /> d. asexual reproduction<br /> <br /> 31. Corn and other monocots have each of the following structures except<br /> a. parallel veins<br /> b. seeds<br /> c. a layer of cambium<br /> d. xylem and phloem<br /> <br /> 32. Green plants store the energy of sunlight by the process of<br /> a. cellular respiration<br /> b. photosynthesis<br /> c. oxidation<br /> d. reproduction<br /> <br /> 33. In plants, food is usually made in the<br /> a. roots<br /> b. stems<br /> c. leaves<br /> d. rootlets<br /> <br /> 34. One function of roots is to<br /> a. take in carbon dioxide<br /> b. give off oxygen<br /> c. anchor plant to the soil<br /> d. produce food<br /> <br /> 35. Multicellular plants have many specialized structures. What function does xylem perform in multicellular vascular plants?<br /> a. The xylem transports water and minerals from the roots to the leaves.<br /> b. The xylem is the place where photosynthesis takes place in a plant.<br /> c. The xylem breaks down sugar into a form that plant cells can use.<br /> d. The xylem is a woody tissue that fills the stem of a plant.<br /> <br /> 36. Which is not a primary function of the stem?<br /> a. absorption<br /> b. conduction<br /> c. support<br /> d. storage<br /> <br /> 37. Ginger is a________.<br /> a. bulb<br /> b. corm<br /> c. rhizome<br /> d. tuber<br /> <br /> 38. The primary functions of the root are ___________.<br /> a. conduction and storage<br /> b. storage and anchorage<br /> c. anchorage and absorption<br /> d. absorption and conduction<br /> <br /> 39. Carbon dioxide used in photosynthesis enters the leaves through the<br /> a. root system<br /> b. stomata<br /> c. phloem<br /> d. fibrovascular bundles<br /> <br /> 40. All of the following reduce loss of water from plants except<br /> a. bark<br /> b. waxy layers on leaves<br /> c. closing of stomata<br /> d. opening of stomata<br /> <br /> 41. The primary functions of leaves are_________.<br /> a. photosynthesis and transpiration<br /> b. transpiration and respiration<br /> c. respiration and digestion<br /> d. respiration and photosynthesis<br /> <br /> 42. Which of the following is not a correctly stated difference between monocots and dicots?<br /> a. parallel veins in monocots; branching, netlike venation in dicot leaves<br /> b. vascular bundles scattered in monocot stems; central vascular stele in dicot stems<br /> c. flower parts in threes in monocots; flower parts in multiples of four or five in dicots<br /> d. usually only primary growth in monocots; secondary growth in many dicots<br /> <br /> 43. How are the processes of photosynthesis and cellular respiration connected?<br /> a. both processes begin with oxygen<br /> b. both processes require sunlight<br /> c. each processes takes place only in plant cells<br /> d. each process makes the material needed in the other process<br /> <br /> 44. Why do cells need oxygen?<br /> a. Oxygen is used during the process of fermentation.<br /> b. Oxygen is used during the process of cell division.<br /> c. Oxygen is used during the process of cellular respiration.<br /> d. Oxygen is used during the process of meiosis.<br /> <br /> 45. What is the result of cellular respiration?<br /> a. Energy is produced from radiant sunlight and carbon dioxide.<br /> b. Energy is produced from sugar molecules and oxygen.<br /> c. Sunlight is converted into sugar molecules and oxygen.<br /> d. Sunlight is converted into water molecules.<br /> <br /> 46. Which of these describes a reproduction method of sexual organism?<br /> a. forming a tuber<br /> b. fusing of sex cells from two parents<br /> c. producing runners<br /> d. division through binary fission<br /> <br /> 47. The diaphragm is used in breathing by each of the following animals except the<br /> a. kangaroo<br /> b. baboon<br /> c. frog<br /> d. human<br /> <br /> 48. Each of the following vertebrates is cold – blooded except<br /> a. fish<br /> b. amphibians<br /> c. birds<br /> d. reptiles<br /> <br /> 49. The embryo develops within the mother in most<br /> a. mammals<br /> b. reptiles<br /> c. amphibians<br /> d. fish<br /> <br /> 50. A feature that relates the platypus to the reptiles is<br /> a. egg – laying<br /> b. cold – bloodedness<br /> c. scales<br /> d. a diaphragm<br /> <div> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://adf.ly/1F5oBL" target="_blank"><img alt="Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1-NjrpCxm6yjAbseWXzXAju2YTydqeOqudQCUdc7hgym5LtE20MCn25TSOjZjV02OCrkKMexBzS7VQClWlabKvR8YlX_gPz4idqAXShssWs9hSM6-Ym3HgwW1V7JJHMyE-X79QK0-KbTU/s1600/dl.png" /></a></div>

LET Reviewer in BIOLOGICAL SCIENCE Part 11

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 1. As green plants make food, they ...

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LET Reviewer in BIOLOGICAL SCIENCE Part 10

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> 101. Which element is not recycled throughout an ecosystem by the process of photosynthesis and respiration?<br /> A. carbon<br /> B. nitrogen<br /> C. oxygen<br /> D. hydrogen<br /> <br /> 102. The gas that is most abundant in the air is<br /> A. oxygen<br /> B. nitrogen<br /> C. carbon dioxide<br /> D. argon<br /> <br /> 103. The greatest source of indoor pollutant is<br /> A. smog<br /> B. radon<br /> C. CFCs<br /> D. sunlight<br /> <br /> 104. All of the following are probable consequences of water related environmental problems except<br /> A. Diarrhea<br /> B. amoebiasis<br /> C. typhoid fever<br /> D. respiratory track infection<br /> <br /> 105. Overdraft is an overuse of groundwater, which makes the reservoirs of groundwater emptied and very seldom replenished especially during the summer months. Which among the following environmental problems related to soil is the probable consequence of overdraft?<br /> A. soil pollution<br /> B. land subsidence<br /> C. soil erosion<br /> D. deforestation<br /> <br /> 106. Plant nutrients such as nitrates and phosphates, which come from fertilizers and detergent, can cause algal bloom. What do you call the phenomenon on which a body of water which contains high concentrations of chemical elements required for life makes the produces bloom by directly nourishing most bacteria than aquatic organisms like fishes?<br /> A. euthrophication<br /> B. biomagnification<br /> C. soil water intrusion<br /> <br /> 107. Which of the following best describes a non-metal?<br /> A. they are ductile and malleable<br /> B. they have high tensile strength<br /> C. they are good insulators<br /> D. they are hard and brittle<br /> <br /> 108. Which is an example of a heterogeneous mixture?<br /> A. Distilled water<br /> B. rubbing alcohol<br /> C. Agua oxinada<br /> D. concrete<br /> <br /> 109. Which of the following phase changes are exothermic?<br /> A. sublimation and melting<br /> B. evaporation and condensation<br /> C.condensation and freezing<br /> D. evaporation and deposition<br /> <br /> 110. Which grouping is composed of pure substances only?<br /> A. fog, dew, brine<br /> B. dew, dry ice, vinegar<br /> C. ice, dry ice, table sugar<br /> D. ice, table salt, fog<br /> <br /> 111. Which of the following best describes a mixture?<br /> A. It is homogeneous<br /> B. It has a definite composition<br /> C. It changes the colors of common indicators<br /> D. Its components are combined in any proportion<br /> <br /> 112. The state of matter that is characterized by strong attractive forces.<br /> A. solid<br /> B. liquid<br /> C. gas<br /> <br /> 113. The components of ink can best be separated using<br /> A. evaporation<br /> B. filtration<br /> C. centrifugation<br /> D. chromatography<br /> <br /> 114. All of the following are chemical properties except<br /> A. toxicity<br /> B. corrosiveness<br /> C. solubility<br /> D. flammability<br /> <br /> 115. Which of the following statements is true?<br /> A. Light has mass<br /> B. Air has volume<br /> C. Heat occupies space<br /> D. Sound has both mass and volume<br /> <br /> 116. Which of the following is an intensive physical property?<br /> A. mass<br /> B. volume<br /> C. color<br /> D. length<br /> <br /> 117. When a pure crystalline yellowish substance is heated in vacuum, a greenish gas and a red powdery substance were produced. In which of the follo9wing will you classify the yellowish substance?<br /> A. element<br /> B. compound<br /> C. mixture<br /> D. pure substance<br /> <br /> 118. Isotopes are atoms that have the same atomic number but different mass numbers. It means also that isotopes are atoms that have<br /> A. the same number of electrons but different number of protons<br /> B. the same number of neutrons but different number of electrons<br /> C. the same number of protons but different number of neutrons<br /> D. the same number of protons but different number of electrons<br /> <br /> 119. This electrically neutral particle was discovered by Chadwick in 1932 with its mass slightly greater than that of proton?<br /> A. electron<br /> B. neutron<br /> C. positron<br /> D. neutrino<br /> <br /> 120. The spoilage of meat is delayed when kept in a refrigerator because the cold temperature<br /> A. keeps the flies/ insects away<br /> B. slows down the action of bacteria<br /> C. changes the color and odor of meat<br /> D. turns the water component of meat to ice<br /> <br /> 121. What happens to a given mass of fluid if heat flow into it?<br /> A. It becomes denser<br /> B. It becomes less dense<br /> C. it becomes colder<br /> D. It becomes heavier<br /> <br /> 122. During chemical changes or chemical reactions, which particles are gained, lost, or shared?<br /> A. protons inside the nucleus<br /> B. neutrons inside the nucleus<br /> C. electrons in the outermost energy level<br /> D. electrons in the innermost energy level<br /> <br /> 123. Which of the following radiation has the highest penetrating power?<br /> A. alpha<br /> B. beta<br /> C. gamma<br /> <br /> 124. Which of the following statements explains why we feel cool after perspiring?<br /> A. vapor in the air condenses in our skin<br /> B. water coming out of our body is cold<br /> C. pores in our skin allow cool air to enter<br /> D. evaporating water in our skin produces a cooling effect<br /> <br /> 125. What is the most practical way to control pollution?<br /> A. decreasing the population<br /> B. more government control of industry<br /> C. careful planning of environmental usage<br /> D. slowing the rate of technological growth<br /> <br /> 126. Humans can cause rapid changes in the environment, sometimes producing catastrophic events. Which statement below is the best example of this concept?<br /> A. lightning causes forest fire<br /> B. shifting crustal plates cause an earthquake<br /> C. changing seasonal winds cause flooding in an area<br /> D. mountainside highway construction causes a landslide<br /> <br /> 127. How are latitude and longitude lines drawn?<br /> A. latitude lines are parallel and longitude lines meet at the poles<br /> B. latitude lines are parallel and longitude lines meet at the equator<br /> C. longitude lines are parallel and latitude lines meet at the poles<br /> D. longitude lines are parallel and latitude lines meet at the equator<br /> <br /> 128. The water part of the earth is also known as<br /> A. lithosphere<br /> B. hydrosphere<br /> C. atmosphere<br /> D. biosphere<br /> <br /> 129. The vibration of the earth's surface due to the release of stored energy when the deformed rock ruptures or returns to its original size and shape?<br /> A. earthquake<br /> B. tsunami<br /> C. faulting<br /> D. folding<br /> <br /> 130. What happens when air is heated?<br /> A. It expands and it rises<br /> B. It expands and sinks<br /> C. It contracts and rises<br /> D. It contracts and sinks<br /> <br /> 131. What do you call the phenomenon wherein there is a marked increase in the earth's surface temperature associated with radiation being trapped by its atmosphere?<br /> A. Global warming<br /> B. greenhouse effect<br /> C. El Nino<br /> D. La Nina<br /> <br /> 132. In the water cycle, which process is responsible for getting water into the atmosphere?<br /> A. Condensation<br /> B. evaporation<br /> C. sublimation<br /> D. melting<br /> <br /> 133. In majority of stars, the most common element is<br /> A. oxygen<br /> B. hydrogen<br /> C. helium<br /> D. nitrogen<br /> <br /> 134. The color of the hottest star is<br /> A. red<br /> B. blue<br /> C. yellow<br /> D. bluish white<br /> <br /> 135. If you want to cook boiled eggs while in the mountains you should<br /> A. use hotter flame<br /> B. boil the eggs for a longer time<br /> C. boil the eggs for a shorter time<br /> D. not boil the eggs, because the water temperature won't get hot enough to cook them<br /> <br /> 136. A metal lid could not be unscrewed from its glass jar. Which of the following is the best way to unscrew it from the jar?<br /> A. Invert the jar with the lid in a very hot water for a few seconds<br /> B. Invert the jar with the lid in a very cold water for a few seconds<br /> C. invert the jar with the lid in cold and then in hot water for a few seconds<br /> D. invert the jar with the lid in hot and then in cold water for a few seconds<br /> <br /> 137. It refers to the temperature at which the molecules have the lowest possible kinetic energy<br /> A. absolute zero<br /> B. melting point<br /> C. boiling point<br /> D. freezing point<br /> <br /> 138. Why does apiece of metal feel colder than a piece of wood at the same temperature?<br /> A. metal is colder than wood<br /> B. metals allow heat to flow through them easily<br /> C. metals have higher specific heat than wood<br /> D. none of the above<br /> <br /> 139. What accounts for the cooling effect inside the refrigerator?<br /> A. the refrigerator is properly insulated<br /> B. vaporization of the refrigeration fluid<br /> C. compression of the refrigerant into liquid<br /> D. the motor converts electrical energy into thermal energy<br /> <br /> 140. What do you call animals that feed on both plant and meat?<br /> A. herbivores<br /> B. carnivores<br /> C. omnivores<br /> D. insectivores<br /> <br /> 141. After drinking dirty water, a student developed bloody diarrhea and liver problems in a few weeks later. Which of the following is the most likely cause of the disease?<br /> A. Paramecium<br /> B. dinoflagellates<br /> C. amoeba<br /> D. euglena<br /> <br /> 142. Chemical produced by some bacteria that can kill or weaken other bacteria<br /> A. antitoxins<br /> B. antibodies<br /> C. antibiotics<br /> D. antiseptic<br /> <br /> 143. When light travels from water to air, what happens to its speed?<br /> A. It increases<br /> B. It decreases<br /> C. It remains the same<br /> <br /> 144. In which medium can sound travel the fastest?<br /> A. wood<br /> B. water<br /> C. air<br /> D. metals<br /> <br /> 145. The sound produced by a piano differs from that of the violin even if both sounds have the same pitch and loudness because of<br /> A. frequency<br /> B. intensity<br /> C. overtones<br /> D. amplitude<br /> <br /> 146. What do you call a type of mixture that scatters light passing through it?<br /> A. solution<br /> B. colloid<br /> C. suspension<br /> <br /> 147. Fleming is a scientist made famous due to his fortunate accidental discovery of penicillin. This is an example of<br /> A. scientific destiny<br /> B. serendipity<br /> C. medical truth<br /> D. hard work<br /> <br /> 148. Why is water considered a universal solvent?<br /> A. It has a high density<br /> B. It has a high specific heat<br /> C. It dissolves polar and non – polar substances<br /> D. It dissolve both polar and ionic substance<br /> <br /> 149. The study of matter with focus on motion, forces and energy?<br /> A. physics<br /> B. chemistry<br /> C. biology<br /> D. earth science<br /> <div> <br /></div>

LET Reviewer in BIOLOGICAL SCIENCE Part 10

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 101. Which element is not recycled ...

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LET Reviewer in BIOLOGICAL SCIENCE Part 9

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> 51. Angiosperms are also known as<br /> A. cone bearing<br /> B. flower bearing<br /> C. seed bearing<br /> D. spore bearing<br /> <br /> 52. Tropical rainforests have many trees and other plants that photosynthesize. What happens when huge areas of tropical rain forests are destroyed?<br /> A. Oxygen level increases and carbon dioxide level increases.<br /> B. Oxygen level increases and carbon dioxide level decreases<br /> C. Oxygen level decreases and carbon dioxide level increases<br /> D. Oxygen level decreases and carbon dioxide level decreases<br /> <br /> 53. How is the conservation of mechanical energy described in a falling object?<br /> A. A falling object loses kinetic energy and gains potential energy.<br /> B. A falling object loses kinetic energy and loses potential energy.<br /> C. A falling object gains kinetic energy and loses potential energy.<br /> D. A falling object loses kinetic energy and loses potential energy.<br /> <br /> 54. Which property of light accounts for the phenomenon of color?<br /> A. wavelength<br /> B. amplitude<br /> C. velocity<br /> D. intensity<br /> <br /> 55. Nights are cooler when the sky is clear than when it is overcast. Why is this so?<br /> A. The sun is hidden from us at night.<br /> B. Cooler air can hold less water vapor.<br /> C. Rain falls when water vapor condenses above freezing point.<br /> D. Heat from the lower atmosphere easily escapes when there is no cloud cover.<br /> <br /> 56. In which rock layers are remains of aquatic organisms most commonly found?<br /> A. Igneous<br /> B. sedimentary<br /> C. metamorphic<br /> D. intrusive<br /> <br /> 57. Two air masses have the same relative humidity. Which of the following can also be said about them?<br /> A. they have the same volume<br /> B. they have the same temperature<br /> C. both have rain clouds<br /> D. none of them<br /> <br /> 58. Which of the following phrases best describes adaptation of organisms?<br /> A. thick covering to conserve water<br /> B. fast movements to escape its enemies<br /> C. blending of color so that it cannot be easily seen by its enemies<br /> D. structure or behavior of an organism to help it survive in its environment<br /> <br /> 59. At what stages in its life cycle is a butterfly most active?<br /> A. egg and larva<br /> B. pupa and adult<br /> C. larva and adult<br /> D. adult and egg<br /> <br /> 60. What type of solar radiation is effectively absorbed by the ozone layer of the earth's atmosphere?<br /> A. infrared<br /> B. ultraviolet<br /> C. gamma<br /> D. X – ray<br /> <br /> 61. We wear light clothes especially during summer because white<br /> A. absorbs heat<br /> B. disperses heat<br /> C. reflects heat<br /> D. refracts heat<br /> <br /> 62. Objects are visible because of the light they<br /> A. reflect<br /> B. absorb<br /> C. diffuse<br /> D. refract<br /> <br /> 63. It makes blue litmus paper turn red<br /> A. salt<br /> B. acid<br /> C. base<br /> D. water<br /> <br /> 64. Smelling a scent of perfume from a distance illustrates<br /> A. cohesion<br /> B. adhesion<br /> C. diffusion<br /> D. all of these<br /> <br /> 65. What is the weight of the man whose mass is 50 kg?<br /> A. 50 N<br /> B. 50 kg<br /> C. 490 N<br /> D. 490 N<br /> <br /> 65.Amphibians have adaptations that protect them from very cold and very warm temperatures. During the cold winter months they become inactive. They bury themselves in mud until the temperature warms up. What do you call the period of inactivity during winter?<br /> A. hibernation<br /> B. aestivation<br /> C. incubation<br /> D. adaptation<br /> <br /> 66. In a neutral atom, the number of protons is equal to the number of<br /> A. electrons<br /> B. neutrons<br /> C. nucleons<br /> D. all of these<br /> <br /> 67. The scientist who have said that an atom is mostly empty space with tiny positive core called the nucleus<br /> A. Dalton<br /> B. Thomson<br /> C. Rutherford<br /> D. Bohr<br /> <br /> 68. What process can efficiently separate alcohol from water?<br /> A. distillation<br /> B. decantation<br /> C. filtration<br /> D. chromatography<br /> <br /> 69. The constant temperature at which solid is changed in its liquid form<br /> A. melting point<br /> B. boiling point<br /> C. dew point<br /> <br /> 70. Urine has a density of 1.02 g/mL. What is the volume of 25 g of urine?<br /> A. 24.5 mL<br /> B. 25.5 mL<br /> C. 0.04 mL<br /> D. 25.0 mL<br /> <br /> 71. Which of the following statements best describes a liquid?<br /> A. It has definite shape<br /> B. It has definite volume<br /> C. It expands to fill its container<br /> D. Its particles are tightly packed with each other<br /> <br /> 72. The movement of the solid part of the earth is called<br /> A. diastrophism<br /> B. faulting<br /> C. earthquake<br /> D. folding<br /> <br /> 73. The rocks that may have been formed from magma in volcanoes or from flowing lave are called<br /> A. sedimentary rocks<br /> B. metamorphic rocks<br /> C. igneous rocks<br /> D. minerals<br /> <br /> 74. The method of farming on the mountainsides to prevent erosion is called<br /> A. crop rotation<br /> B. contour farming<br /> C. strip cropping<br /> D. mountain farming<br /> <br /> 75. The process of breaking down rocks<br /> A. erosion<br /> B. volcanism<br /> C. weathering<br /> D. all of these<br /> <br /> 76. The upper part of lithosphere that contains various rock layers at different depths<br /> A. crust<br /> B. mantle<br /> C. core<br /> D. none of these<br /> <br /> 77. At night, the wind blows from the land to the sea. This is because the cool air over the land blows in to replace the warm air rising from the sea. This type of breeze is called<br /> A. sea breeze<br /> B. and breeze<br /> C. both of them<br /> D. none of them<br /> <br /> 78. The type of cloud the produces precipitation and is usually seen before it rains<br /> A. cirrus<br /> B. stratus<br /> C. cumulus<br /> D. nimbus<br /> <br /> 79. The condition of the atmosphere at any given time and place<br /> A. weather<br /> B. climate<br /> C. season<br /> D. none of them<br /> <br /> 80. It refers the actual amount of water vapor present in the atmosphere<br /> A. relative humidity<br /> B. absolute humidity<br /> C. both of them<br /> <br /> 81. Which layer of the atmosphere contains the ozone layer<br /> A. troposphere<br /> B. mesosphere<br /> C. stratosphere<br /> D. thermosphere<br /> <br /> 82. Who advocated the idea that all things are made up of four elements of fire, air, earth, and water?<br /> A. Newton<br /> B. Galileo<br /> C. Aristotle<br /> D. Einstein<br /> <br /> 83. Which energy changes takes place in a flashlight with batteries?<br /> A. chemical – electrical – light<br /> B. electrical – light – chemical<br /> C. light – chemical – electrical<br /> D. chemical – light – electrical<br /> <br /> 84. How do solutions differ from compounds?<br /> A. solutions are heterogeneous mixtures; compounds are homogeneous<br /> B. solutions vary in composition; compound have definite composition<br /> C. solutions have definite composition; compounds vary in composition<br /> D. solutions are formed in chemical reactions; compound combine physically<br /> <br /> 85. Which part of the flower develops into seeds?<br /> A. pistil<br /> B. ovary<br /> C. ovule<br /> D. ovary wall<br /> <br /> 86. Copper is used for electrical wires because it is ductile. Which of the following describes ductility of metals?<br /> A. the softness of metals<br /> B. the hardness of metals<br /> C. can be drawn into fine wires<br /> D. can be hammered forming this sheets<br /> <br /> 87. Why does air temperature usually decrease toward the poles?<br /> A. there is plenty of ice near the poles<br /> B. air generally moves toward the equator<br /> C. cold air near the poles prevent heating of the land<br /> D. areas near the poles receive less solar energy per unit area<br /> <br /> 88. A material that does not transmit light that strikes its surface is known as<br /> A. opaque<br /> B. transparent<br /> C. translucent<br /> <br /> 89. The mechanism of heat transfer that is only possible in liquids and gases is called<br /> A. conduction<br /> B. convection<br /> C. radiation<br /> <br /> 90. What is the process of changing solid to gas without passing the liquid state?<br /> A. condensation<br /> B. evaporation<br /> C. sublimation<br /> D. freezing<br /> <br /> 91. Sound that is heard louder than the others has a greater<br /> A. pitch<br /> B. frequency<br /> C. frequency<br /> D. amplitude<br /> <br /> 92. Why are shadows formed?<br /> A. light produces a dark area<br /> B. light is dispersed in all direction<br /> C. light travels in a straight line<br /> D. light is scattered by a smooth surface<br /> <br /> 93. In a guitar, which string can produce a high pitch?<br /> A. thin and long<br /> B. thick and long<br /> C. thin and short<br /> D. thick and short<br /> <br /> 94. Which device can converts mechanical energy to electrical energy?<br /> A. battery<br /> B. generator<br /> C. motor<br /> D. photo voltaic cell<br /> <br /> 95. What is the force that opposes motion?<br /> A. friction<br /> B. tension<br /> C. weight<br /> D. normal force<br /> <br /> 96. Why are burns caused by steam more damaging than the one caused by boiling water?<br /> A. Water has a higher temperature<br /> B. Steam is a vapor of water molecules<br /> C. Steam has more energy per kilogram<br /> D. Steam is easily formed than boiling water<br /> <br /> 97. What happens when vapor condenses into a liquid?<br /> A. It absorbs heat<br /> B. It releases heat<br /> C. its temperature increases<br /> D. its temperature decreases<br /> <br /> 98. What do you call sound with frequency that is below 20 Hz?<br /> A. supersonic<br /> B. subsonic<br /> C. infrasonic<br /> D. ultrasonic<br /> <br /> 99. The separation of white light into colors of the spectrum is called<br /> A. scattering<br /> B. dispersion<br /> C. reflection<br /> D. refraction<br /> <br /> 100. Which among the following is a non – renewable energy resource?<br /> A. wind energy<br /> B. solar energy<br /> C. fossil fuel<br /> D. geothermal energy<br /> <br />

LET Reviewer in BIOLOGICAL SCIENCE Part 9

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 51. Angiosperms are also known as ...

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LET Reviewer in BIOLOGICAL SCIENCE Part 8

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <br /> 1. Which of the following statements is definitely true about the nature of science?<br /> A. Science will help make the world a better place to live in.<br /> B. Science can always uncover the truth in the realm of nature.<br /> C. Scientific work requires a dedication that excludes the lives of people in other fields of work.<br /> D. Theories in science can be disproved by testing: a well established theory can be demolished with a single observation.<br /> <br /> 2. Which of the following processes is best associated with technology than with science?<br /> A. designing for a need<br /> B. uncovering natural phenomena<br /> C. discovering the nature of matter<br /> D. constructing concepts, principles and laws<br /> <br /> 3. Which of the following statements best describes the connection between science and technology?<br /> A. Scientist use the laws and principles discovered by technologists.<br /> B. Technology is the part of science that deals with mechanical problems.<br /> C. Technology involves the practical applications of scientific knowledge.<br /> D. Science depends on technology for ideas and the organization of experimental work.<br /> <br /> 4. Which of the following is a technological concept rather than a scientific concept?<br /> A. Tungsten has a high melting point.<br /> B. Metals are good conductors of heat.<br /> C. Resistance is inversely proportional to current.<br /> D. Fluorescent lamps are improved through methods of manufacturing.<br /> <br /> 5. You want to add exactly 35.00 g of salt to a solution. What instrument must you use to measure this amount?<br /> A. beaker<br /> B. thermometer<br /> C. graduated cylinder<br /> D. triple beam balance<br /> <br /> 6. Young people stand straight. Very old ones usually stoop. Why?<br /> A. Sedentary lives of the old.<br /> B. Habit of stooping developed in the old.<br /> C. Greater gravitational pull on the old than on the young.<br /> D. Bones of the old have become weak and soft and their joints become loose.<br /> <br /> 7. Why is it not quite possible for viruses to live and multiply in the outer layers of our skin?<br /> A. The outer layer of the skin has dead cells only.<br /> B. The outer layer of the skin has oil which is harmful to viruses.<br /> C. The outer layer of the skin has a lower temperature unsuitable for viruses.<br /> <br /> D. The outer layer of the skin has salt from perspiration which is harmful to viruses<br /> 8. Alcohol thermometer works on the principle that<br /> A. Volume usually increases with pressure.<br /> B. Temperature usually increases with density.<br /> C. Volume usually increases with temperature.<br /> D. Temperature usually increases with pressure.<br /> <br /> 9. Which of the following is an important factor in explaining why seasons occur?<br /> A. Earth's axis is tilted.<br /> B. The sun's axis is tilted.<br /> C. Earth rotates on its axis.<br /> D. The sun rotates on its axis.<br /> <br /> 10. To preserve the fertility of the soil, farmer should employ the following except<br /> A. strip cropping<br /> B. continuous farming<br /> C. terracing<br /> D. contour farming<br /> <br /> 11. How can the presence of a person afflicted with HIV and/or AIDS be handled?<br /> A. Discreetly reporting the case to health authorities.<br /> B. Conducting home forum to discuss the identification of AIDS cases.<br /> C. Avoid and discourage patronage of places frequented by these persons.<br /> D. Discourage the establishment of recreation centers like cabarets and discos.<br /> <br /> 12. The following describe chemical change except<br /> A. A chemical change takes place when a solid is changed to liquid then changed to gas<br /> B. For a chemical change to take place, heat, light, or electricity is either needed or given off.<br /> C. Some examples of chemical change are souring of milk, ripening of fruit, and digestion of food.<br /> D. In a chemical change, a new substance is formed, with chemical properties that are different from, the original substance.<br /> <br /> 13. Where do we trace the El Nino phenomenon?<br /> A. rising ocean levels<br /> B. very severe earthquakes<br /> C. annual changes in seasons<br /> D. thinning or depletion of the ozone layer<br /> <br /> 14. Why does the greenhouse effect result to warmer temperature near the earth's surface?<br /> A. clouds trap infrared radiation<br /> B. soil absorbs incoming radiation<br /> C. ozone traps ultraviolet radiation<br /> D. carbon dioxide traps infrared radiation<br /> <br /> 15. Why do people feel warmer just before it rains?<br /> A. Heat released by the condensation of water vapor.<br /> B. The clouds prevent heat from escaping the earth.<br /> C. The increased relative humidity makes them feel warmer.<br /> D. The warming is due to the heat absorbed by the evaporation of water.<br /> <br /> 16. A good method to prevent soil from being eroded from a hill is to<br /> A. irrigate the area<br /> B. plow the hill regularly<br /> C. plant only ion alternate layers<br /> D. plant the hill with grass or tree<br /> <br /> 17. The possible interconnected feeding relationships among organisms in an ecosystem are termed<br /> A. Food pyramid<br /> B. Food web<br /> C. Food chain<br /> D. Food groups<br /> <br /> 18. Two beakers contain boiling water. Beaker A has a volume of 150 mL while beaker B has a volume of 600 mL. Which of the following statements is true?<br /> A. Both beakers are at equal temperatures.<br /> B. Both beakers have the same thermal energy.<br /> C. Beaker A has more thermal energy than beaker B.<br /> D. Beaker A has a higher temperature than beaker B.<br /> <br /> 19. On the ground, Francis weighs 500n. Aboard flying at an elevation of 1500 m, what would his mass be?<br /> A. 5 kg<br /> B. 50 kg<br /> C. 100 kg<br /> D. 150 kg<br /> <br /> 20. How will you classify the statement, “The earth's outer core is a liquid.”?<br /> A. a law<br /> B. a theory<br /> C. an inference<br /> D. an observation<br /> <br /> 21. To save fuel it is advisable to keep your pot tightly closed while cooking. This prevents<br /> A. escape of nutrients<br /> B. escape of steam, thus built up pressure<br /> C. escape of substances which tenderize the food.<br /> D. escape of vapor which increases the boiling point.<br /> <br /> 22. Not all organisms are harmful. Which of these is done by yeast?<br /> A. encourage disease food<br /> B. cause Yakult to be milky<br /> C. cause milk to become cheese<br /> D. promotes the rising of bread for baking<br /> <br /> 23. Which of the following organisms is used to convert milk to cheese?<br /> A. bacteria<br /> B. protozoa<br /> C. viruses<br /> D. algae<br /> <br /> 24. Why do mountain climbers use oxygen equipment at the top of high mountains?<br /> A. There is a hole in the ozone layer.<br /> B. There is less oxygen in the air at great heights.<br /> C. There is less nitrogen in the air at great heights.<br /> D. There is no air on top of very high mountains.<br /> <br /> 25. War experts use energy in its discovery of nuclear bombs. When energy is released from a nuclear fission, what occurs?<br /> A. Atoms are split into fragments.<br /> B. Energy is released from fission.<br /> C. Decrease in mass nuclear bombs.<br /> D. The energy possessed is used for bombing nations<br /> <br /> 26. Which of the following alternative sources of energy could result to acid rain?<br /> A. solar<br /> B. biogas<br /> C. geothermal<br /> D. nuclear energy<br /> <br /> 27. Which of the following is predicted to be the result of global warming?<br /> A. rising ocean level<br /> B. thinning of ozone layer<br /> C. more severe earthquakes<br /> D. larger volcanic eruptions<br /> <br /> 28. Billy is one student who tries his best to submit laboratory reports, projects, and other requirements on time. Which of the following scientific attitudes does Billy possess?<br /> A. patience<br /> B. responsibility<br /> C. open-mindedness<br /> D. honesty<br /> <br /> 29. A manager of a textile company said it is too expensive to treat liquid wastes so he suggested digging hole near the factory where the wastes can be stored. Is this environmentally safe?<br /> A. No, the liquid can be recycled.<br /> B. No, the liquid waste will seep to the ground water.<br /> C. Yes, the liquid wastes will be less hazardous with time.<br /> D. Yes, the liquid will pass through layers of soil and becomes clean.<br /> <br /> 30. The air in Metro Manila is now heavily polluted with carbon dioxide and lead dust from the motor vehicles, factories, and restaurants. As a citizen, you will minimize pollution by following all the following practices except<br /> A. Bury garbage rather than burning it.<br /> B. Burning garbage in your own backyard.<br /> C. Participate actively in government's tree planting project.<br /> D. Help disseminate information regarding the advantages of using anti-pollution devices for motor vehicles<br /> <br /> 31. Insecticides are used to control insect populations so that they do not destroy crops. However, over time, a new insecticide has to be developed as they become less effective in killing the insects. Why?<br /> A. Insecticides build up in the soil.<br /> B. Insecticides are concentrated at the bottom of the food chain.<br /> C. Surviving insects pass their resistance to insecticides to their offsprings.<br /> D. Surviving insects have learned to include insecticides as a food source.<br /> <br /> 32. Why do fishermen catch more fish during the new moon than during the full moon?<br /> A. Fishes look for mates during the new moon<br /> B. Fishes are attracted to the light from the fishing boat<br /> C. Fishes go near the water surface during new moon because the water is warmer.<br /> D. Fishes are more active during new moon because the salt content of water is just right.<br /> <br /> 33. In one of his investigations, Alexander Fleming noticed that bacteria growing on agar did not grow next to a mold that was growing on the same plate. He wrote in his report,”The mold may be producing a substance that kills bacteria.” The statement is best described as<br /> A. a conclusion<br /> B. a hypothesis<br /> C. an observation<br /> D. a generalization<br /> <br /> 34. Which of the following is the primary reason why scientists repeat measurements they take during experiments?<br /> A. To list all the results in a table<br /> B. To estimate experimental error<br /> C. To check if the equipment is working<br /> D. To change the experimental conditions.<br /> <br /> 35. When scientists investigate, it is said that they follow the scientific method. How will you logically arranged the essential steps in the scientific method?<br /> 1. make a hypothesis<br /> 2. recognize the problem<br /> 3. formulate the simplest generalization<br /> 4. perform experiments to test the prediction<br /> 5. predict the consequences of the hypothesis<br /> <br /> A. 1, 4, 2, 3, 5<br /> B. 2, 1, 5, 4, 3<br /> C. 2, 5, 1, 3, 4<br /> D. 3, 2, 1, 4, 5<br /> <br /> 36. Which of the following factors contribute to “greenhouse effect”?<br /> A. destruction of the forests<br /> B. use of carbon dioxide by land plants<br /> C. depletion of minerals in the soil by overfarming<br /> D. use of solar glass panels to capture radiant energy<br /> <br /> 37. All interacting units of matter tend to move toward a state in which energy content is a minimum, and the energy distribution is most random. In the process of attaining this state, energy matter and energy-matter transformations occur. This scheme is governed by all of the following concepts except<br /> A. conservation<br /> B. equilibrium<br /> C. homeostasis<br /> D. isostacy<br /> <br /> 38. Matter exists in the form of units which can be classified in hierarchies or organizational levels. Which of the following units show a correct hierarchical organization?<br /> A. atom – molecule – element – compound – mixture<br /> B. cell – tissue – organ – system – organism<br /> C. solids – liquids – gases – plasma<br /> D. protons – neutrons – electrons – ions<br /> <br /> 39. Which of the following statements is not true of energy in the biosphere?<br /> A. Energy flows a one – way path.<br /> B. Energy is conserved in the biosphere.<br /> C. Energy follows a cycle through the web of life.<br /> D. Energy leaves the living system in the form of heat.<br /> <br /> 40. Electrical energy is used to power a light bulb. How does the amount of electrical energy used to compare to the amount of light energy produced?<br /> A. less than the amount of light energy produced.<br /> B. more than the amount of light energy produced.<br /> C. the same as the amount of light energy produced<br /> D. depends on the wattage produced by the light bulb<br /> <br /> 41. The following statements are ideas about the environment. Which one is false?<br /> A. Clear water is clean water.<br /> B. Plants help clean the air of harmful gases.<br /> C. It takes millions of years for crude oil to form.<br /> D. Fire can sometimes start by itself in a big pile of decaying garbages.<br /> <br /> 42. Ultrasound is often used by medical workers to obtain features of internal body parts. Infrasound on the other hand is commonly used in:<br /> A. monitoring conditions in pregnant women<br /> B. detecting harmful living tissues inside the body<br /> C. seismographic surveying of structures below the earth's surface<br /> D. providing moving pictures of tidal waves and earthquakes<br /> <br /> 43. A 12 cm red hot steel bar is placed into a pan of boiling water. Which statement correctly explains the resulting heat transfer?<br /> A. Heat flow out of the kettle to the cooler surrounding air.<br /> B. Heat flow from the water to the steel bar because boiling water has more thermal energy.<br /> C. Heat flows from the water to the steel bar since the water molecules have higher average kinetic energy.<br /> D. Heat flows from the water to the steel bar since the steel bar is at a higher temperature.<br /> <br /> 44. Which of the following acid groups is found in vinegar?<br /> A. nitric acid<br /> B. acetic acid<br /> C. formic acid<br /> D. ascorbic acid<br /> <br /> 45. Which of the following forms of energy travels through empty space?<br /> A. chemical energy<br /> B. radiant energy<br /> C. sound energy<br /> D. all of them<br /> <br /> 46. Why do we see the sun rise in the east and set of the west?<br /> A. the earth rotates from west to east<br /> B. the earth revolves counterclockwise<br /> C. the earth rotates from west to east<br /> D. the sun rotates in a clockwise manner<br /> <br /> 47. All of the following are physical properties except<br /> A. sugar dissolves in water<br /> B. water evaporates from an open container<br /> C. moth balls sublime at room temperature<br /> D. butter turns rancid when left unrefrigerated<br /> <br /> 48. Colloids maybe dispersed in a gas, liquid, or solid. Which of the following colloidal systems show a liquid dispersed in a gas medium?<br /> A. clouds<br /> B. smoke<br /> C. paint<br /> D. beaten egg white<br /> <br /> 49. Which blood transfusion would agglutinate blood?<br /> A. A donor ---> A recipient<br /> B. A donor ---> O recipient<br /> C. A donor ---> AB recipient<br /> D. O donor ---> AB recipient<br /> <br /> 50. All of the following compose the male reproductive organ of a flowering plant except<br /> A. anther<br /> B. pollen grain<br /> C. Stigma<br /> D. stamen<br /> <div> <br /></div>

LET Reviewer in BIOLOGICAL SCIENCE Part 8

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 1. Which of the following statement...

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LET Reviewer in BIOLOGICAL SCIENCE Part 7

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="text-align: center;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST IN BIOLOGICAL SCIENCE</b><br /> <b><br /></b> 51. Arthropods exhibit fast and coordinated movement because they possess _____________.<br /> a. an endoskeleton   <br /> b. jointed appendages<br /> c. exoskeleton<br /> d. bilateral symmetry<br /> <br /> 52. The following statements are true of spiders EXCEPT<br /> a. Have rectal glands for potassium and water reabsorption<br /> b. Tagmata include cephalothorax and abdomen<br /> c. Contain silk glands for web making<br /> d. Posses 3 pairs of legs<br /> <br /> 53. The relationship that exists between insects and flowering plants is called ______________.<br /> a. parasitism     <br /> b. predation<br /> c. mutualism<br /> d. commensalism<br /> <br /> 54. Which of the following causes our nose to “run” when we cry?<br /> a. The lungs release water vapor.<br /> b. Mucous glands are activated.<br /> c. Tears enter the duct to the nasal cavity.<br /> d. The sinuses release water.<br /> <br /> 55. What is the main function of the peripheral nervous system?<br /> a. Communicates with the endocrine glands<br /> b. Regulates our heartbeat and breathing<br /> c. Controls our emotions and intelligence<br /> d. Connects central nervous system to all organs<br /> <br /> 56. What causes our bones to turn brittle?<br /> a. Turning into muscle tissue <br /> b. Increase in flexibility<br /> c. Turbidity decreased<br /> d. Removal of collagen<br /> <br /> 57. Which part of the neuron conducts impulse from other neurons toward the cell body?<br /> a. Axon <br /> b. Ganglia <br /> c. Synapse <br /> d. Dendrite<br /> <br /> 58. The tendency to react automatically to an external stimulus is called a/an _____________.<br /> a. Habituation <br /> b. aggression <br /> c. imprinting<br /> d. reflex<br /> <br /> 59. Which hormone promotes the development of secondary female sexual characteristics such as broad pelvis and enlarged breasts?<br /> a. Testosterone   <br /> b. Estrogen<br /> c. Melatonin<br /> d. Growth<br /> <br /> 60. Which part of the ear is dangerously affected when sound is of hundred decibels?<br /> a. Pinna     <br /> b. Eustachian tube<br /> c. Semi-circular canal<br /> d. Tympanic membrane<br /> <br /> 61. What organs cause high concentration of calcium in the blood?<br /> a. Liver and Pancreas   <br /> b. Pituitary and Testis<br /> c. Thyroid and Parathyroid<br /> d. Pineal body and Thymus<br /> <br /> 62. People who live in high altitude have blood that is described to have _____ blood cells.<br /> a. High number of white <br /> b. Low number of red<br /> c. Same number of red<br /> d. High number of red<br /> <br /> 63. Creativity is a desirable trait that should be developed among our students. Describe a creative person.<br /> a. Creates beautiful set-ups. <br /> b. Imitates scientists at work<br /> C. Originates own procedures.<br /> d. Announces same solutions.<br /> <br /> 64. If the flow of blood in a vessel is toward the heart then the vessel is identified as a ________.<br /> a. Ventricle <br /> b. Artery <br /> c. Vein <br /> d. Atrium<br /> <br /> 65. The funnel shaped opening through which the egg cell is released to is the<br /> a. Umbilical cord   <br /> b. Uterus<br /> c. Fallopian tube<br /> d. Proximal tubules<br /> <br /> 66. Which one is insufficient in cretinism?<br /> a. Insulin     <br /> b. Adrenalin<br /> c. Parathormone<br /> d. Thyroxin<br /> <br /> 67. When there is no food available for days, what could serve as the fuel source of the cells in your body?<br /> a. Fats in adipose tissue <br /> b. Albumin in the blood<br /> c. Cholesterol in blood vessels<br /> d. Bone marrow inside the bone<br /> <br /> 68. What instrument has a flexible scope that is used to examine the esophagus and stomach?<br /> a. ultrasound   <br /> b. laser<br /> c. endoscope<br /> d. scanner<br /> <br /> 69. Where does exchange of materials between the blood and other body tissues take place?<br /> a. Platelets <br /> b. Veins <br /> c. Arteries <br /> d. Capillaries<br /> <br /> 70. What explains why our lips are “redder” than out palm?<br /> a. Many blood vessels are located around the lips<br /> b. Lips epidermis is thinner<br /> c. Lips are heavily keratinized<br /> d. There is increased blood flow in the lips<br /> <br /> 71. Which part of breathing occurs when the diaphragm muscles are pulled downwards, thus increasing the chest cavity?<br /> a. Expiration   <br /> b. Release of energy<br /> c. Release of gases<br /> d. Inspiration<br /> <br /> 72. In an experiment, which is the condition being introduced and whose effect is being observed?<br /> a. Conclusion formulated   <br /> b. Constant variable<br /> c. Manipulated variable<br /> d. Tentative variable<br /> <br /> 73. Which of the following pancreatic fluids is responsible for the breakdown of fat?<br /> a. Chymotrypsin <br /> b. Amylase <br /> c. Trypsin <br /> d. Lipase<br /> <br /> 74. Which part of the brain controls our rate of breathing?<br /> a. Cerebellum <br /> b. Cerebrum<br /> c. Spinal cord<br /> d. Medulla<br /> <br /> 75. Through what part does the embryo obtain its nourishment from the mother?<br /> a.  oviduct     <br /> b. food tubules<br /> c. fallopian tube<br /> d. umbilical cord<br /> <br /> 76. What organ is controlled by the autonomic nervous system?<br /> a. Brain     <br /> b. Heart     <br /> c. Spinal cord     <br /> d. Skeletal muscles<br /> <br /> 77. What is one of the main functions of the large intestine?<br /> a. Excrete undigested food<br /> b. Digest food into liquid form<br /> c. Excrete bile pigments from ducts<br /> d. Complete the digestion of proteins<br /> <br /> 78. What do you call food in a semi-liquid form, partially digested and mixed with hydrochloric acid?<br /> a. Mucosa     <br /> b. Chyme<br /> c. Saliva<br /> d. Bolus<br /> <br /> 79. Which would you advise children to prevent osteoporosis?<br /> a. More intake of all vitamins <br /> b. Consistent bone density test<br /> c. Less bone exercise and fatigue<br /> d. Adequate calcium and Vitamin D<br /> <br /> 80. Which is considered the endocrine master gland due to its influence on the activity of all the other glands?<br /> a. Thyroid <br /> b. Adrenal <br /> c. Pituitary <br /> d. Parathyroid<br /> <br /> 81. What enzyme is secreted by the pancreas which splits sugar?<br /> a. Lipase <br /> b. Pepsin <br /> c. Trypsin <br /> d. Amylase<br /> <br /> 82. What do we get from carbohydrates and fats?<br /> a. Cell builders   <br /> b. Tissue builders   <br /> c. Heat and energy<br /> d. Growth regulators<br /> <br /> 83. What secretes substance which enables the sugar to be stored in the liver?<br /> a. Islets of  Langerhans <br /> b. Adrenal medulla <br /> c. Adrenal cortex<br /> d. Thyroid<br /> <br /> 84. What sac protects the heart?<br /> a. Pericardium <br /> b. Septum <br /> c. Atrium <br /> d. Valve<br /> <br /> 85. What BEST describes respiration?<br /> a. Taking in carbon dioxide and releasing oxygen.<br /> b. Taking in oxygen and releasing carbon dioxide.<br /> c. Breathing in a mixture of different gases.<br /> d. Breathing in of pure gas<br /> <br /> 86. Which type of muscle tissue found in the walls of our stomach is responsible for the process of peristalsis?<br /> a. Striated <br /> b. Cardiac <br /> c. Smooth <br /> d. Voluntary<br /> <br /> 87. Which of the hormone triggers ovulation?<br /> a. Follicle-stimulating   <br /> b. Testosterone   <br /> c. Luteinizing<br /> d. Prolactin<br /> <br /> 88. What do we call a prediction that is made based on educated guess?<br /> a. Inference<br /> b. Hypothesis<br /> c. Interpolation<br /> d. Extrapolation<br /> <br /> 89. How does the liver assist the digestive system?<br /> a. Stores starch<br /> b. It secretes bile<br /> c. Acts on protein food<br /> d. Mixes with the pancreatic juice<br /> <br /> 90. What structures in the tongue make it distinguished food quality?<br /> a. Nerves<br /> b. Tasters<br /> c. Taste buds<br /> d. Taste epithelium<br /> <br /> 91. Which protein found in the plasma is responsible for blood clothing?<br /> a. Fibrinogen<br /> b. Albumin<br /> c. Globulin<br /> d. Serum<br /> <br /> 92. White blood cells are the “soldiers” of the body. They fight the disease-causing organisms. They are the ___________.<br /> a. Antigens<br /> b. Antibodies<br /> c. Phagocytes<br /> d. Erythrocytes<br /> <br /> 93. What blood test is used to provide information about agglutination reactions between donor and recipient blood?<br /> a. Clotting test<br /> b. Blood count<br /> c. Blood chemistry<br /> d. Type and cross-match<br /> <br /> 94. Which produce the hormone MOST closely associated with the control of calcium metabolism?<br /> a. Ovaries<br /> b. Pancreas<br /> c. Adrenal glands<br /> d. Parathyroid glands<br /> <br /> 95. What is the function of the lymph?<br /> a. Transport oxygen<br /> b. Contains fibrinogen<br /> c. Enables the blood to clot<br /> d. Protects the body from infection<br /> <br /> 96. Which part of the brain is responsible for intelligence, memory and learned behavior?<br /> a. Cerebellum<br /> b. Cerebrum<br /> c. Thalamus<br /> d. Medulla<br /> <br /> 97. What is the major problem involved in organ transplants?<br /> a. Phagocytes<br /> b. Sex of donor<br /> c. Race of recipient<br /> d. Antigen-antibody reaction<br /> <br /> 98. What special equipment is placed inside the heart to generate electrical impulse?<br /> a. Endoscope<br /> b. Pacemaker<br /> c. Heart pump<br /> d. Artificial valve<br /> <br /> 99. The modern horse has fewer toes than its ancestors’. Such change is governed by _________.<br /> a. use and disuse<br /> b. natural selection<br /> c. reduction division<br /> d. chromosomal deletions<br /> <br /> 100. Which theory on how life began do chemists and geologists agree on today?<br /> a. Spontaneous generation<br /> b. Special creation<br /> c. Cosmozoic<br /> d. Naturalistic<br /> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://sh.st/ghZ2E" target="_blank"><img alt="Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1-NjrpCxm6yjAbseWXzXAju2YTydqeOqudQCUdc7hgym5LtE20MCn25TSOjZjV02OCrkKMexBzS7VQClWlabKvR8YlX_gPz4idqAXShssWs9hSM6-Ym3HgwW1V7JJHMyE-X79QK0-KbTU/s1600/dl.png" /></a>

LET Reviewer in BIOLOGICAL SCIENCE Part 7

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST IN BIOLOGICAL SCIENCE 51. Arthropods exhibit fast and coor...

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LET Reviewer in BIOLOGICAL SCIENCE Part 6

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" imageanchor="1" style=""><img alt="LET Reviewer for Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXo9Ow3a6jVE3nAHBKoHDvgZVcqrxTQL9UDIjVVAnO8y2du2HdacAHaGyQgsvXCXv3u2GWFRKM5wI9TSw5Tbo81DpvfmbAK6Z7crfAWUHksRd-wvB3t-0cIkaeoQGbAmau-I_GiD0lpPKD/s1600/mcqs-biology.jpg" title="LET Reviewer for Biological Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Biological Science</td></tr> </tbody></table> <b>PRACTICE TEST </b><b>IN BIOLOGICAL SCIENCE</b><br /> <b><br /></b> 1. Which of the following is a part of the process of chemiosmosis?<br /> a. Protons move along the electron transport chain.<br /> b. Water molecules are split.<br /> c. Hydrogen ions pass through membranes.<br /> d. Light is absorbed by chlorophyll.<br /> <br /> 2. During mitosis, a double-stranded chromosome is attached to a spindle fiber at the ___________.<br /> a. cell plate<br /> b. centromere<br /> c. centrosome<br /> d. centriole<br /> <br /> 3. Which is an effect of drugs on cells?<br /> a. Produce toxic substance<br /> b. Discontinuous cell activity<br /> c. Cause damage to their structure<br /> d. Poison the cell liquid<br /> <br /> 4. The cell wall of plant is made of ______________.<br /> a. Lipids<br /> b. Cellulose<br /> c. Protein<br /> d. Cell membrane<br /> <br /> 5. Which is the storage cell of plants?<br /> a. Microtubule<br /> b. Collenchyma<br /> c. Meristem<br /> d. Parenchyma<br /> <br /> 6. Which results from drinking saltwater?<br /> a. Poisoning of the cells<br /> b. Dehydration of the cells<br /> c. Increase in cell pressure<br /> d. Bursting of the cells<br /> <br /> 7. What kind of tissue lines our skin and what is its important function?<br /> a. Nerve tissue; responsible for reflexes<br /> b. Epithelial; protection fromultraviolet radiation<br /> c. Nerve tissue; receive stimuli on the skin<br /> d. Epithelial; produce new cells when peeled off<br /> <br /> 8. At metaphase of the first meiotic division, the chromosomes are attached to the spindle fibers as ____________.<br /> a. doublechromatids<br /> b. non-homologous pairs<br /> c. single chromatid strand<br /> d. a tetrad of chromatids<br /> <br /> 9. Which type of cell would probably provide the best opportunity to study lysosomes?<br /> a. Leaf<br /> b. Nerve<br /> c. Muscle<br /> d. White blood<br /> <br /> 10. Which best describes meiosis as another form of cell division with accompanying nuclear changes?<br /> a. The nuclear changes follow one another indefinitely.<br /> b. Each new cell has double the amount from both parents.<br /> c. The nucleoli break up into two parts and disappear.<br /> d. Each new cell has half the number of chromosomes.<br /> <br /> 11. How are mitochondria and chloroplasts similar to bacteria? They<br /> a. are larger than normal cells.<br /> b. are bounded by a single membrane.<br /> c. lack ribosomes.<br /> d. have a limited amount of genetic material.<br /> <br /> 12. Which is the energy storage compound used to do all forms of work of the cell?<br /> a. Electron<br /> b. Adenine<br /> c. Nicotinamide<br /> d. Adenosine triphosphate<br /> <br /> 13. Meiosis reduces genetic make-up by half. What process brings it back to diploid state?<br /> a. Menstruation<br /> b. Fertilization<br /> c. Ejaculation<br /> d. Mitosis<br /> <br /> 14. The bipolar nature of the cell membrane is due to ___________.<br /> a. presence of carriers<br /> b. presence of glycolipids<br /> c. phospholipid bilayer<br /> d. integral protein<br /> <br /> 15. When a red blood cell is placed in distilled water, it _____________.<br /> a. plasmolyses<br /> b. remains the same<br /> c. shrinks<br /> d. swells<br /> <br /> 16. The “eyes” of potato are actually ______________.<br /> a. internodes<br /> b. nodes<br /> c. leaf scars and buds<br /> d. stems<br /> <br /> 17. Which of these is NOT a fruit?<br /> a. Cucumber<br /> b. Ampalaya<br /> c. Squash<br /> d. Carrot<br /> <br /> 18. Which plant has underground stem modified for reproduction?<br /> a. Banana<br /> b. Bermuda<br /> c. Tubers<br /> d. Strawberry<br /> <br /> 19. Which plants formed the vast coal beds during the carboniferous period?<br /> a. Lycopods<br /> b. Conifers<br /> c. Angiosperms<br /> d. Gymnosperms<br /> <br /> 20. What kind of relationship is exhibited by an alga and a fungus in lichen?<br /> a. Commensalism<br /> b. Parasitism<br /> c. Mutualism<br /> d. Competition<br /> <br /> 21. Chlorophyll appears green because the green portion of light is ___________.<br /> a. dispersed<br /> b. absorbed<br /> c. refracted<br /> d. reflected<br /> <br /> 22. The end products of dark reaction phase of photosynthesis are ADP and ________.<br /> a. carbon dioxide<br /> b. sugar<br /> c. carbon<br /> d. nitrogen<br /> <br /> 23. Which gas is needed by the seed during germination?<br /> a. Nitrogen<br /> b. Carbon dioxide<br /> c. Hydrogen<br /> d. Oxygen<br /> <br /> 24. Which is the universal energy source of the cell of all living things?<br /> a. Carbon<br /> b. ATP<br /> c. H2O<br /> d. PGAL<br /> <br /> 25. When the staminate flower is found in one plant and the pistillate flower on another, the plants is described as ___________.<br /> a. complete<br /> b. monoecious<br /> c. robust<br /> d. dioecious<br /> <br /> 26. Which pigment is dominant in red algae?<br /> a. Phycocyanin<br /> b. Fucoxanthin<br /> c. Chlorophyll<br /> d. Phycoerythrin<br /> <br /> 27. Which process during photosynthesis involves the addition of hydrogen?<br /> a. Oxidation<br /> b. Hydration<br /> c. Carbonation<br /> d. Reduction<br /> <br /> 28. The dark reaction phase of photosynthesis consists of a series of chemical reactions which end up with the formation of a 3-carbon sugar called ____________.<br /> a. ADP<br /> b. NADPH<br /> c. ATP<br /> d. PGAL<br /> <br /> 29. Which cell structure regulates the opening and closing of the stomata?<br /> a. Phloem<br /> b. Xylem<br /> c. Companion<br /> d. Guard<br /> <br /> 30. Spraying some plants with combination of auxins and gibberellins will ____________.<br /> a. promote ripening of fruits<br /> b. result to seed dormancy<br /> c. allow division of cells<br /> d. enlarge fruit growth<br /> <br /> 31. All flowering plants belong to ______________.<br /> a. conifers<br /> b. angiospermae<br /> c. filicinae<br /> d. gymnospermae<br /> <br /> 32. Fruit growers often propagate their plants by a sexual means because the resulting off spring will __________.<br /> a. be an improved variety thanthe parent<br /> b. show little variation from the parent<br /> c. bear larger fruit than the parent<br /> d. show no environmental variation<br /> <br /> 33. Which of the following is incorrectly paired?<br /> a. Cnidaria- corals<br /> b. Porifera- sponge<br /> c. Annelida- earthworm<br /> d. Platyhelminthes-Ascaris<br /> <br /> 34. What process is cause for the upward movement of water in very tall trees?<br /> a. Transpiration<br /> b. Osmosis<br /> c. Turgor pressure<br /> d. Air pressure<br /> <br /> <br /> 35. Which popular plant is described as carnivorous?<br /> a. Water hyacinth<br /> b. Cactus<br /> c. Pitcher plant<br /> d. Kataka-taka<br /> <br /> 36.What is the purpose of RA 8749?<br /> a. Prevent rather than control air pollution<br /> b. Formulate air pollution management<br /> c. Utilize sustainable development<br /> d. All of the above<br /> <br /> 37. What do you call the male gametophyte of an angiosperm?<br /> a. Pollen<br /> b. Ovule<br /> c. Seed<br /> d. Petal<br /> <br /> 38. Which root system is the best adapted for anchorage?<br /> a. Secondary<br /> b. Tertiary<br /> c. Taproot<br /> d. Fibrous<br /> <br /> 39. Egg-laying mammals are called ____________.<br /> a. viviparous<br /> b. primates<br /> c. oviparous<br /> d. marsupials<br /> <br /> 40. To what order do pouch bearing mammals?<br /> a. Marsupials<br /> b. Craniata<br /> c. Monotremata<br /> d. Placental mammals<br /> <br /> 41. Large colonies belonging to class Anthozoa secrete hard skeletons of lime which later form reefs.<br /> a. Sea anemone<br /> b. Obelia<br /> c. Coral<br /> d. Jellyfish<br /> <br /> 42. When body parts are paired on either side of the body; this type of symmetry is called _________.<br /> a. Dorso-ventral<br /> b. Bilateral<br /> c. Radial<br /> d. Dorsal<br /> <br /> 43. What substance do leeches secrete which keeps the blood they feed on liquid state?<br /> a. Hemoglobin<br /> b. Ecdysone<br /> c. Anticoagulin<br /> d. Fibrinogen<br /> <br /> 44. One who specializes in all kinds of fishes and their characteristics has expertise on _______________.<br /> a. Taxonomy<br /> b. histology<br /> c. entomology<br /> d. ichthyology<br /> <br /> 45. In protozoans, digestion occurs in the ___________.<br /> a. stomach<br /> b. contractile vacuole<br /> c. ribosome<br /> d. food vacuole<br /> <br /> 46. What is a distinguishing characteristic of Homo sapiens over the lower mammals?<br /> a. Blood vessels<br /> b. Sensitive skin<br /> c. Large brain<br /> d. Endoskeleton<br /> <br /> 47. What kind of adaptation enables the walking stick to elude its enemies?<br /> a. Aggressive mimicry<br /> b. Aggressive adaptation<br /> c. Protective mimicry<br /> d. Protective coloration<br /> <br /> 48. Which stages of incomplete metamorphosis is undergone by grasshopper?<br /> a. Nymph, pupa, adult<br /> b. Egg, larva, pupa, adult<br /> c. Egg, nymph, adult<br /> d. Egg, pupa, adult<br /> <br /> 49. Which are the hosts of <i>Ascaris lumbricoides</i> and <i>Ascaris suum</i>?<br /> a. Cow and man<br /> b. Man and dog<br /> c. Cow and pig<br /> d. Man and pig<br /> <br /> 50. Two organisms can be identified as belonging to the same species if they can ____________.<br /> a. eat the same kind of food<br /> b. breed in a natural setting<br /> c. tolerate one another in nature<br /> d. survive together in nature<br /> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://sh.st/ghLrp" target="_blank"><img alt="Biological Science" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1-NjrpCxm6yjAbseWXzXAju2YTydqeOqudQCUdc7hgym5LtE20MCn25TSOjZjV02OCrkKMexBzS7VQClWlabKvR8YlX_gPz4idqAXShssWs9hSM6-Ym3HgwW1V7JJHMyE-X79QK0-KbTU/s1600/dl.png" /></a>

LET Reviewer in BIOLOGICAL SCIENCE Part 6

Majorship LET Reviewer LET Reviewer for Biological Science PRACTICE TEST  IN BIOLOGICAL SCIENCE 1. Which of the following is a part...

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