Amutation that results in a change in one amino acid is called a mutation. a. silent b. missense

Prezygotic Isolation: Two Species of Guppies, Brown Bears and Polar Bears, Two closely Related Species of frogs.

Postzygotic Isolation: A hybrid zygote of two species, Two species of plants reproduce

Explanation:

Prezygotic isolation includes mechanisms that do not allow breeding of organisms. Postzygotic isolation includes mechanisms that cause isolation of species after fertilization.

This is the answer that I got when I submitted it on Edmentum and it said I was correct.