24022900-Biology-Study-Guide-4 - Biology Study Guide 4 1...

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Biology Study Guide 4 1) _______ A) a mechanism for how evolution occurs. B) that the Earth is older than 6,000 years. C) a mechanism for evolution that was supported by evidence. D) a way to use artificial selection as a means of domesticating plants and animals. E) that evolution occurs. 2) Which statement about natural selection is most correct? 2) _______ A) Different species that together occupy the same habitat will adapt to that habitat by undergoing the same genetic changes. B) Natural selection is the sole means by which populations can evolve. C) Well - adapted individuals leave more offspring, and thus contribute more to the gene pool, than poorly adapted individuals. D) Adaptations beneficial in one habitat should generally be beneficial in all other habitats as well. E) Adaptations beneficial at one time should generally be beneficial during all other times as well. 3) Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection? 1. Differential reproduction occurs. 3. Allele frequencies within the population change. 4. Poorly adapted individuals have decreased survivorship. 3) _______ A) 4, 2, 3, 1 B) 4, 1, 2, 3 C) 4, 2, 1, 3 D) 2, 4, 1, 3 E) 2, 4, 3, 1 4) Which of the following statements is not an inference of natural selection? 4) _______ A) Individuals whose inherited characteristics best fit them to the environment should leave more offspring. B) Subsequent generations of a population should have greater proportions of individuals that possess favorable traits. C) An individual organism undergoes evolution over the course of its lifetime. D) Often only a fraction of offspring survive, because there is a struggle for limited resources. E) Unequal reproductive success among its members leads a population to adapt over time. 5) Which of the following must exist in a population before natural selection can act upon that population? 5) _______ A) sexual reproduction B) variation among individuals caused by environmental factors C) genetic variation among individuals D) A and C only E) A, B, and C 6) Which of the following pieces of evidence most strongly supports the common origin of all life on Earth? 6) _______
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A) All organisms reproduce. B) All organisms show heritable variation. C) All organisms use essentially the same genetic code. D) All organisms require energy. E) All organisms have undergone evolution. 7) What would be the best technique for determining the evolutionary relationships among several closely related species, each of which still contains living members? 7) _______ A) comparative anatomy B) examining the fossil record C) DNA or RNA analysis D) comparison of homologous structures E) comparative embryology Use the following information to answer the questions below. A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 36% of the animals display a recessive trait ( aa ), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the
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This note was uploaded on 12/06/2010 for the course BIOL 1020 taught by Professor Shaw during the Spring '10 term at Baltimore Hebrew University.

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24022900-Biology-Study-Guide-4 - Biology Study Guide 4 1...

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