Molecular clocks are based on the idea that _____.

1.	Molecular clocks are based on the idea that _____.
A.	On average neutral mutations arise at a constant rate
B.	Directional selection occurs at a constant rate
C.	Mutations occur once every generation
D.	Molecules resonate at a certain frequency that can be measured
Answer» D. Molecules resonate at a certain frequency that can be measured

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