Biologists Are Studying Two Species Whose DNA Is Known to Differ

question 82

Multiple Choice

Biologists are studying two species whose DNA is known to differ by 10%. Knowledge of which of the following would be least important in calibrating a molecular clock to determine how rapidly evolution has proceeded with these two species?

• A)the fossil record of these two species
• B)a geological event that separated the species at a particular time.
• C)the function of each of these regions of DNA
• D)the time of divergence of closely related species

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