The substitution rate is expressed in terms of substitutions per generation; however, molecular clock estimates show that substitutions accumulate annually regardless of the generation time
What explanation for this discrepancy is illustrated in the figure below?
What will be an ideal response?
ANS:
That long generation time animals tend to smaller population sizes and that organisms with a shorter generation time tend to have larger population sizes. These factors can-cel each other out to produce a nearly constant annual rate of substitution regardless of generation time.
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Fill in the blank(s) with correct word
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