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

mutation
mutation

selective pressures
selective pressures

fitness
fitness

natural selection
natural selection
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Answer 1

natural selection

Explanation: limited food is a selective pressure that gives long-legged birds a survival/reproductive advantage, causing the trait to increase in the population over time — a classic example of natural selection.