Which of the following factors is the primary criterion for determining species boundaries when applying the biological species concept?
A) geographic isolation
B) niche differences
C) gene flow
D) morphological similarity

Question

Quizplus · Accepted Answer

The biological species concept primarily uses reproductive isolation, of which gene flow is a critical component, to determine species boundaries. It posits that species are groups of actually or potentially interbreeding natural populations that are reproductively isolated from other such groups.

Which of the Following Factors Is the Primary Criterion for Determining