Which of the Following Describes Allopatric Speciation

Multiple Choice

Which of the following describes allopatric speciation?

A) Gene flow between subpopulations minimizes differences in their gene pools.
B) A single population suddenly divides into two reproductively isolated groups without being geographically isolated.
C) A geographic separation occurs between subpopulations leading to reproductive isolation.
D) Wide phenotypic differences that appear between subpopulations due to variation in their environments.
E) Subpopulations that are geographically isolated but still able to interbreed.