If natural selection is the driving force for speciation of two competing subspecies, you would expect to see a bell-shaped distribution of selected phenotypes after selection.

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Quizplus · Accepted Answer

If natural selection is the driving force for speciation, then you would expect to see a shift towards the extreme phenotypes that are better suited for their specific environment, resulting in a bimodal or trimodal distribution rather than a bell-shaped distribution.

If Natural Selection Is the Driving Force for Speciation of Two