Question

the evolution of antibiotic resistance is an example of
random selection.

directional selection.

diversifying selection.

stabilizing selection.

steady selection.

Explanation:

Antibiotic resistance evolves when antibiotics act as a selective pressure favoring bacteria with resistance traits. This shifts the population's trait distribution toward increased resistance, which is the definition of directional selection (selection for one extreme phenotype). Random selection is not a recognized type of natural selection; diversifying selection favors two extremes; stabilizing selection favors intermediate traits; "steady selection" is not a standard term. Thus, directional selection is the correct answer.

Answer:

B. directional selection.