Test: AP Environmental Science

1.

Which of the following is an example of an initial step associated with natural selection?

None of these

Ash from the industrial revolution darkens the tree trunks in a moth species' habitat, the dark moths are favored and light moth populations are reduced.

All of these

A Chihuahua breeder singles out the smallest individuals from each litter of puppies and breeds them together to produce smaller puppies.

An ancient, short-necked giraffe stretches its neck to reach higher leaves and its offspring inherit a long neck.

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