10. Today, the fossil record A. can be dated reasonably well only with uranium-2

Question

10. Today, the fossil record A. can be dated reasonably well only with uranium-238. B. can be dated precisely, to within a single year, using DNA hybridization. C. can be dated only with one layer in relation to older layers below and younger layers above, no actual dates can be estimated. D. can be dated precisely, to within a single year, using radioactive isotopes. E. can be dated reasonably well using a variety of radioactive isotopes with known half-lives. 11. Progressive changes in the fossil record are evidence for evolution because A. they show evolutionary change at the level of the individual. B. they show descent with modification. C. they show gaps in the fossil record. D. they show inheritance of acquired characteristics.

Explanation / Answer

10. Answer is E. Radio Isotopes with known half life value are responsible for identification of Fossils

11. Answer is C. Gap between species in fossil record gives idea about evolutionary links

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