When comparing the sequences of a homologous gene in four different species, one pair of species shows a 1% difference, whereas the other pair shows a 3% difference. Which pair diverged longer ago from their common ancestor and why?
A. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been more time to accumulate mutations.
B. The pair with a 3% difference? a larger difference (3% instead of 1%) indicates that there has been more time to accumulate mutations.
C. The pair with a 3% difference? A larger difference (3% instead of 1%) indicates that there has been less time to accumulate mutations.
D. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been less time to accumulate mutations.
Answer: B
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