In Order for Allopatric Speciation to Occur,first There Must Be

question 20

Multiple Choice

In order for allopatric speciation to occur,first there must be a geographic separation of two populations of the same species.The second step requires:

• A)additional extrinsic isolating mechanisms to become involved.
• B)an increase in gene flow between the populations.
• C)physical and behavioral changes that keep them from interbreeding.
• D)physical and behavioral changes that permit occasional hybridization.

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