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

Question

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

Quizplus · Accepted Answer

The Answer of 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

The Numbers of Fledged Young from Female Robins of Different