Question

question 7 of 25
the histogram on the left shows a populations distribution of phenotypes
before selection occurs. the histogram on the right shows the distribution
after selection.

which type of selection is shown?

a. directional

b. nongenetic

c. disruptive

d. stabilizing

Explanation:

Directional selection shifts the population's phenotype distribution. Here, the mode (peak) of the phenotype distribution moves to a new value after selection, which is characteristic of directional selection. In stabilizing selection, the mode remains but the curve narrows. Disruptive selection creates two or more modes. Nongenetic is not a type of natural selection related to phenotype - distribution changes in this context.

Answer:

A. Directional