Question

a scientist wrote a paper titled \directional selection in action\ after observing a population of mice for 15 years. the mice typically preferred to eat berries, although a few would also eat insects. after a drought in year 3, the scientist observed that more mice were eating insects. by year 10, most of the mice in the population ate insects in addition to berries. which best describes her article? her title is accurate because two opposite extremes are favored. her title is accurate because one extreme is favored. she should change her title because she is observing stabilizing selection. she should change her title because she is observing disruptive selection.

Explanation:

Directional selection favors one extreme phenotype. In this case, the shift from mostly berry - eating to mostly insect - eating (an extreme of the diet variation) is observed.
Stabilizing selection favors the average phenotype. Disruptive selection favors two opposite extremes. The title "Directional Selection in Action" is appropriate as one extreme (insect - eating) is favored over time.

Answer:

Her title is accurate because one extreme is favored.