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Biology Quarter 3 Post-Test 1. (6.a) What term describes the variety of organisms, their genetic differences, the communities, and ecosystems in which they occur? A. B. C. D. Succession Biodiversity Biochemical Cycle Climate 2. (6.a) Identify what components of an ecosystem are not part of a community. A. B. C. D. Biotic factors Ferns Abiotic factors Beetles 3. (6.b) How would the food web be affected if plants were eliminated? A. B. C. D. Herbivores would become carnivores. The food web would collapse. The herbivores would disappear. Nothing would happen. 4. (6.b) What are the factors that affect population growth? A. B. C. D. Physical environment Food source Predators All of the above 1 Biology Quarter 3 Post-Test 5. (6.c) A three fold increase in the number of coyotes in a region would result in ____________. A. B. C. D. a decrease in the size of a population of it’s prey. an increase in the size of a population of it’s prey. no increase or decrease in the population of it’s prey. none of the above. 6. (6.c) An example of population fluctuation through the introduction of a nonnative population species is ______________. A. B. C. D. increase in hummingbird population. added horses to a herd. an increase in the rabbit population. adding crocodiles in the Colorado river. 7. (6.d) Carbon atoms return to the pool of carbon dioxide in the air and water by __________. A. B. C. D. respiration. combustion. erosion. all of the above 8. (6.d) What is the process by which materials pass between the nonliving environment and living organisms? A. B. C. D. Biochemical cycle Energy pyramid Food web Primary succession 2 Biology Quarter 3 Post-Test 9. (6.e) What part do decomposers play in the stability of an ecosystem? A. They release nutrients back into the environment to be used by other organisms. B. They produce bacteria and fungi. C. They produce energy storing molecules. D. They create biodiversity. 10. (6.e) What organisms act as producers for the community that lives at the surface of the ocean sea? A. B. C. D. Jelly fish Marsh plants Plankton Sea birds 11. (6.f) The energy pyramid is a representation of ___________. A. B. C. D. the flow of energy through ecosystems. the transfer of energy through ecosystems. the different organisms in an ecosystems. lost energy. 12. (6.f) What percentage of energy is transferred from one trophic level to the next? A. B. C. D. 90% 50% 25% 10% 3 Biology Quarter 3 Post-Test 13. (7.a) What is an example of a Phenotype with a correct allele? A. B. C. D. C – Rabbit with fully colored coat. C – Himalayan rabbit: White with dark eartips, nose, paws, and tails. Cc – Albino Rabbit. C – Rabbit with light gray coat. 14. (7.a) How do most multicellular eukaryotes form specialized reproductive cells? A. B. C. D. Binary fission Fragmentation Meiosis Mitosis 15. (7.b) The mutated allele that causes Sickle Cell Anemia is ______________? A. B. C. D. a recessive allele that causes a red blood cell in shape of a sickle. sex linked and dominant white blood cell. sex linked and dominant red blood cell. autosomal and dominant white blood cell. 4 Biology Quarter 3 Post-Test 16. (7.b) Refer to the diagram. Pea Plant Cross ? ? Tt tt Tt tt What genotypic ratio is expected in the offspring of this cross? A. B. C. D. 1Tt : 1tt 1Tt : 3tt 1TT : 1tt 3Tt : 1tt 17. (7.c) Why do new mutations occur in a gene pool? A. B. C. D. For survival of the species. Variety is the spice of life. They don’t change. All of the above. 18. (7.d) Variations within a species ____________. A. decreases a population. B. is threatening to the survival of a species. C. increases the likelihood that at least some members of a species will survive. D. creates too much competition for the survival of the species. 5 Biology Quarter 3 Post-Test 19. (8.a) According to Darwin, natural selection effects the rate of reproduction when __________. A. B. C. D. individuals eat lots of junk food. they have physical or behavioral traits. individuals are born with very large cranials. you live below the equator. 20. (8.a) What caused the change in the finch’s beaks as seen in the Grant’s study? A. B. C. D. Larger birds. Water supply. Food supply. Number of offspring. 21. (8.b) Which is not an element of natural selection? A. B. C. D. Genetic variation. Environmental challenges to reproduce. Overproduction of offspring and a struggle for survival. Multi-racial. 22. (8.b) Speciation takes place as a result of all of the below, except ____________. A. B. C. D. natural selection. separate populations become distinct. varying conditions (environmental pressure). pollution. 6 Biology Quarter 3 Post-Test 23. (8.c) What is genetic drift? A. B. C. D. Movement of species. Destruction of habitat. Landslide. Reduction in population size by a natural disaster. 24. (8.c) Genetic drift will ______________. A. B. C. D. increase population size. promote the survival of tigers with beneficial traits. reduce genetic diversity. promote genetic diversity. 25. (8.d) Evolution is _______________. A. the result of genetic changes that occurs in constantly changing environment. B. the result of genetic stability that occurs in the environment. C. the difference in reproductive rates. D. the low genetic diversity in the initial population. 26. (8.d) Why do we find certain people pretty or handsome? A. B. C. D. They were born on a sunny day. Inherited from both parents. Eating a balanced diet. Low genetic diversity in the initial population. 7 Biology Quarter 3 Post-Test 27. (8.e) By analyzing rocks in which fossils are found, we can see the following other environmental factors. A. B. C. D. Flooding Erathquakes Meteor strikes All of the above 28. (8.e) When we see fossils of organisms that no longer exist, we are referring to _______________. A. B. C. D. biological diversity. episodic speciation. mass extinction. dramatic variation. 8 Biology Quarter 3 Post-Test Answer Sheet Question Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Correct Answer B C B D A C D A A C A D A C A A A C B C D D D C A B D C 9 Standard 6.a 6.a 6.b 6.b 6.c 6.c 6.d 6.a 6.e 6.e 6.f 6.f 7.a 7.a 7.b 7.b 7.c 7.d 8.a 8.a 8.b 8.b 8.c 8.c 8.d 8.d 8.e 8.e