Antibiotic resistant strains of bacteria are a modern health concern. Namely, the overuse of antibiotics has promoted the survival of bacteria with alleles that allow resistance. This is an example of ____ selection.
A)directional
B)stabilizing
C)disruptive
D)recessive
E)fitness

Question

Quizplus · Accepted Answer

Directional selection occurs when a certain trait is favored over another, leading to an increase in the frequency of alleles that promote that trait. In this case, the overuse of antibiotics has selected for bacteria with alleles that confer resistance, leading to an increase in their frequency over non-resistant bacteria.

Antibiotic Resistant Strains of Bacteria Are a Modern Health Concern