Suppose a Biologist Has Data Showing Both the Divergence Times

question 231

Multiple Choice

Suppose a biologist has data showing both the divergence times between species and the number of changes at a gene for the species.Now suppose that the biologist plots divergence time on the x axis and the number of changes on the y axis.If a molecular clock is operating, then the slope of that curve must be

• A) increasing.
• B) constant.
• C) decreasing.
• D) one change per million years.
• E) zero.

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