Test: AP Environmental Science

1.

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

All of these

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

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.

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

None of these

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