What did the Grants conclude about how selection acts on the medium ground finches from their long-term study of the birds on Daphne Major?

A) The strength of selection varies over time.
B) The direction of selection varies over time.
C) Beak size should continue to get larger over time.
D) a and b
E) a and c

Medium Ground Finches

A species of finch that is one of Darwin's finches, studied for its evolutionary adaptations to changes in food availability on the Galápagos Islands.

Selection Strength

The intensity of selection pressure applied on a population, which can influence the speed and direction of evolutionary changes.

Daphne Major

An island in the Galápagos archipelago that served as the primary research site for Peter and Rosemary Grant's studies of evolutionary biology.