Data on Survival of Juvenile Black-Bellied Seedcrackers as a Function

question 1

Multiple Choice

Data on survival of juvenile black-bellied seedcrackers as a function of beak size is shown in the accompanying figure.Given the relative survival rates of juvenile birds in terms of both the lower mandible width and length,this is a clear example of ________.

• A) directional selection
• B) stabilizing selection
• C) disruptive selection
• D) selection gradient

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