The Numbers of Fledged Young from Female Robins of Different

question 149

Multiple Choice

The numbers of fledged young from female robins of different sizes were assayed and are presented in the table. Assume that body size is at least partially heritable.Assuming that all other fitness aspects (survival, etc.) are independent of size, this population is most likely experiencing ______ selection, and the population should _______ in size over many generations.

• A) directional; increase
• B) directional; stay the same
• C) directional; decrease
• D) stabilizing; increase
• E) stabilizing; decrease

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