Which of the following is true about genetic drift? of Select one: a. affects only neutral alleles. O b. reduces genetic variation within a population. C. can lead to divergence between populations. d. always results in an increase in fitness e. b and O f. a, b, and g. all of the above 17 Which of the following is true of homologous traits? of Select one: a. always perform the same function in different species b. always perform a different function in different species c. are inherited from a common ancestor d. a and e. b and c 18 Scientists discover a new fossil that they expect is at least three million years old. To estimate the age of the fossil they would most likely of Select one: O a search for layers of volcanic ash in rock layers above and below the location of the fossil. b. use radiocarbon dating to determine the age of the fossil itself. c. use radiocarbon dating to determine the age of the sedimentary layer in which the fossil was found. d. all of the above ооо e. none of the above
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