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BIOL 1001M W2013 MI (Feb. 6) Key

The permanent loss of major groups of organisms the

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Unformatted text preview: scendant groups. Natural selection Gradualism Uniformitarianism Inheritance of acquired characteristics Use and disuse Which of the following ideas did NOT influence Darwin’s idea of evolution by natural selection is based? A. B. C. D. E. Processes that occur today occurred in the past. Phenotypic changes that occur in parents’ lifetimes are passed on to their offspring. Populations change over time. Modern features of the Earth are the cumulative result of slow, but continuous processes. All of these (A ­D) influenced Darwin’s idea of evolution by natural selection. 10. Which of the following best describes a mass extinction? A. B. C. D. E. A rapid decrease in ecological diversity. The loss of part of a population. The permanent loss of major groups of organisms. The temporary loss of major groups of organisms. Only B and C. 3 BIOL 1001 Midterm I W2013 vA 11. The fossil record is an extremely biased sample of organisms that are now extinct. Which of the following is NOT a reason for that bias? A. Organisms with hard parts, such as teeth, shells, and skeletons are more likely to be preserved. B. Organisms living in certain habitats were more likely to be buried in sediments and preserved than were organisms in other habitats. C. Organisms with broad geographic distributions and large populations are more likely to be preserved than rare species. D. Exposed fossils are often subject to weathering whereas those beneath the surface are protected. E. All of the above (A ­D) are reasons for bias in the fossil record. 12. Which measurement(s) would help determine absolute dates by radiometric means? A. B. C. D. E. The accumulation of the daughter isotopes The loss of the parent isotopes. The loss of the daughter isotopes. All of A, B, and C are correct. Only A and B. 13. Vestigial traits and neutral changes in DNA sequences are examples A. B. C. D. E. adaptations. acclimations. convergent traits. nonadaptive traits. developmental homologies. 14. The aardvark (placental), giant anteater (placental), echidna (monotreme), and numbat (marsupial) are all different types of mammals found in different parts of the world; all are adapted (have longer snouts and tongues) to consume ants and termites. The morphological similarities enabling a diet of ants and termites is most likely due to A. B. C. D. E. genetic correlation. convergent evolution. homology. vestigial traits. divergent evolution. 15. What can be concluded about comparing differences in DNA between different species? A. B. C. D. Only DNA sequences can be used to compare relatedness between...
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