Question

Consider the following scenario:

In an aquatic bird population, some birds have long legs. Other birds have short legs. The food supply is minimal. The birds with long legs are able to wade farther into the water where they can find fish. Over time, the birds with long legs become more common.

What scientific term best describes this scenario?

(1 point)
Responses

natural selection
natural selection

selective pressures
selective pressures

fitness
fitness

mutation

Answer 1

natural selection

Explanation: Long-legged birds have a heritable trait that gives them an advantage (access to food) in a resource-limited environment, so they leave more offspring and become more common — the classic process of natural selection.