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)

Question

• natural selection
• fitness
mutation
selective pressures

Answer 1

• natural selection

Answer 2

Over time, the variation that gives an advantage (1 point)
• can limit the number of individual organisms.
• becomes less common in the population.
• can limit the number of selective pressures.
• becomes more common in the population.

Answer 3

• becomes more common in the population.