Staphlococcus aureus is a bacterium that causes wound infections.Many strains of S.aureus now exist that have evolved resistance to the potent antibiotic,methicillin.This is an example of ____ selection.
A) directional
B) stabilizing
C) disruptive
D) frequent
E) more than one of these types of

Question

Quizplus · Accepted Answer

This is an example of directional selection because the environment (use of methicillin) is favoring the survival and reproduction of individuals with traits that allow them to resist the antibiotic, leading to an increase in the frequency of antibiotic-resistant strains over time.

Staphlococcus Aureus Is a Bacterium That Causes Wound Infections