SAT Subject Biology Practice Question 218: Answer and Explanation

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Question: 218

8. Which of the following is required for speciation to take place?

A. Increased genetic variation
B. Random mating
C. Reduced gene flow
D. Geographic isolation
E. Mutation

Correct Answer: C


Only a reduction in gene flow is absolutely required for speciation to take place. Populations cannot evolve independently if their gene pools are shared.

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