are used in dating materials from the distant past. Which of the following state
ID: 199016 • Letter: A
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are used in dating materials from the distant past. Which of the following statements about radioactive dating techniques is true? A. It gives exact ages of rock strata.t 1 year). B. It uses a technique in which the degree of radioactive decay is measured, the younger radioactive decay ns that have not absorbed radiation. D. It gives the general ages of rock strata. (±1 million years). It uses a technique in which the deg ree of radioactive decay is measured, the older the rock the more E. radioactive decay 13. The most precise method of obtaining estimates of the absolute ages of geological deposits is A. apply the principle of superposition (younger deposits above older deposits). B. measure rates of sedimentary rock formation. C. study the sequence of fossil types in the deposits. D. make salinity measurements in ocean sediment deposits. E. measure the ratios of various radioactive isotopes in the deposits. 14. Homologous structures are A. structures of animals that have the same appearances B. structures of animals that have different appearances body part in a common ancestor C. structures of animals that appear to have evolved from different parts of their bodies. D. structures of animals that have different appearances and functions but different ancestors. and functions but obviously no common ancestor. and functions but seem to have evolved from the same 15. The side toes of a horse, the pelvis of the whale, and the human appendix are all examples of structures that resemble structures of presumed ancestors, which are known as A. analogous structures. B. vestigial structures. C. homologous structures. D. acquired structures. E. homeotic mutations. 16. Which one of the following is not important to the concept of homology? A. Homologous features must be found in a common ancestor. B. It can include anatomical, physiological, or molecular features. C. Features must share a common developmental pattern. D. Species with homologous features must be related E. None of the features being compared can be vestigial 17. The observation that different geographical areas sometimes exhibit plant and animal communities of similar appearance, even though the individual plants and animals are not closely related, is called A. the fossil record. B. adaptation. C. homology D. divergent evolution. E. convergent evolution.Explanation / Answer
60. Answer: E) 4
61. Answer: E) A
62. Answer: B) 4
12. B) It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay.
13. E) measure the ratios of various radioactive isotopes in the deposits.
14. B. structures of animals that have different appearances and functions but seem to have evolved from the same body part in a common ancestor.
15. B) vestigial structures.
16. E) None of the features being compared can be vestigial.
17. E) convergent evolution.
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