AP Biologymediummcq1 pt
A butterfly species splits into two after a mountain range rises between its populations. This scenario is
A.allopatric speciation
B.sympatric speciation
C.gene flow
D.stabilizing selection
Explanation
Core Concept
The new geographic barrier blocks gene flow, letting the halves diverge independently — the classic allopatric pathway.
Correct Answer
Aallopatric speciation
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