Chimpanzees exhibit 99% genetic similarity to humans.Cows share approximately 80% of their DNA sequence with humans.Scientists can predict the relative age of a common ancestor using DNA sequences.Which of the following statements regarding molecular clocks is true?
A) Molecular clocks cannot provide information regarding the relatedness of organisms or how distantly related common ancestors are from descendant species.
B) The common ancestor of cows,chimpanzees,and humans lived more recently than the common ancestor of chimpanzees and humans.
C) Chimpanzees,humans,and cows were at one time more closely related,but due to genetic drift have become more distantly related from one another.
D) The common ancestor of chimpanzees and humans lived more recently than the common ancestor of cows,chimpanzees,and humans.
E) Cows do not share a common ancestor with chimpanzees and humans,and any genetic relatedness is by chance.
Correct Answer:
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