A population of hummingbirds has a range of beak lengths. Af…
A population of hummingbirds has a range of beak lengths. After discovering a new food source—nectar deep inside long, trumpet-shaped flowers—hummingbirds with longer tongues begin to survive and reproduce more than others. Over time, most hummingbirds in the population have longer tongues. Which type of natural selection is most likely responsible for this change?