With the use of effective vaccines,polio has become a very rare disease and far fewer people get polio than once did.This is an example of ____ selection
A) directional
B) stabilizing
C) disruptive
D) mutational
E) infrequent

Question

Quizplus · Accepted Answer

Directional selection occurs when one extreme of a trait is favored over others, leading to a shift in the population's trait distribution. In this case, the use of vaccines has favored individuals with immunity to polio, reducing the prevalence of the disease.

With the Use of Effective Vaccines,polio Has Become a Very