Ancestors of giraffes with shorter necks could not reach branches high up in trees for food.This led to ____ for longer necked giraffes.

Question

Quizplus · Accepted Answer

Directional selection describes the process by which a particular phenotype is favored over other phenotypes, resulting in the allele frequency shift toward the favored phenotype. In this case, giraffes with longer necks were favored as they were able to reach higher up branches for food, leading to an increase in the frequency of the allele responsible for the longer neck trait over time.

Ancestors of Giraffes with Shorter Necks Could Not Reach Branches