Imagine the birds that eat peppered moths went extinct. What would happen to the peppered moth population? What will be an ideal response?
ANSWER: At present, the birds provide a selective pressure on the peppered moth population. Since the
trees are currently free of pollution, the lighter colored moths are less likely to be eaten and
thus are more prevalent. In the absence of selective pressure however, both light and dark
moth types would survive equally, and the population would come to be a mix of light and
dark colored moths unless some other selective pressure against color were active.
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