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

Question

Quizplus · Accepted Answer

The function of each of these regions of DNA is least important for calibrating a molecular clock, which primarily relies on mutation rates and divergence times rather than the specific functions of DNA regions.

Biologists Are Studying Two Species Whose DNA Is Known to Differ