Examine the Two Squirrel Populations in the Accompanying Figure

question 19

Multiple Choice

Examine the two squirrel populations in the accompanying figure. The populations are separated by a geographic barrier. If after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred?

• A)Hybrid offspring of the two populations begin to appear.
• B)The two populations are not interbreeding freely.
• C)One species will increase into a population size twice as large as the other species.
• D)Polyploidy is creating new species.

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