What does the biological species concept use as the primary criterion for determining species boundaries?
A) geographic isolation
B) niche differences
C) gene flow
D) morphological similarity
E) molecular (DNA, RNA, protein) similarity

Name: What does the biological species concept use as the primary criterion for determining species boundaries? A) geographic isolation B) niche differences C) gene flow D) morphological similarity E) molecular (DNA, RNA, protein) similarity
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The Answer is C

What Does the Biological Species Concept Use as the Primary