Most starlings produce four to five eggs in each clutch. Starlings producing fewer or more than this have reduced fitness. Which of the following terms best describes this situation?
A) directional selection
B) stabilising selection
C) disruptive selection
D) sexual selection

Question

Quizplus · Accepted Answer

Stabilizing selection is when individuals with intermediate or average traits have higher fitness compared to those with extreme traits. In this case, starlings producing four to five eggs have higher fitness compared to those producing fewer or more, indicating stabilizing selection.

Most Starlings Produce Four to Five Eggs in Each Clutch