Which of the following examples results from stabilizing selection?
A)The birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same.
B)There is an increase in antibiotic-resistant strains of bacteria.
C)There is an increase in the number of different breeds of dog.
D)Garter snakes with different coloration patterns behave differently when threatened.

Question

Quizplus · Accepted Answer

Stabilizing selection favors average traits and selects against extreme variations. In this example, the birth weight at which newborn humans are most likely to survive represents the average trait, and therefore stabilizing selection is the most likely evolutionary force at work.

Which of the Following Examples Results from Stabilizing Selection