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Gradualism means Natural Selection would normally happen over many generations and very

• slowly

• quickly

• in space

• beyond time

According to natural selection, light colored tree trunks would favor

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

A physical trait favored by an environmental change can be called an

• adaptation

• extinction

• possibility

• mutation

Two populations of the same species are separated by land barriers like rivers or mountains.

• geographical isolation

• temporal isolation

• adaptive ratiation

• behavioral isolaton

All the possible gene combinations in a population.

• allele

• gene pool

• genome

• mitosis