Question

question 21 of 25
humans and gorillas have one different amino acid in their hemoglobin sequence. what does this say about the evolution of these two species?

a. they are closely related.

b. they are the same species.

c. humans evolved from gorillas.

d. they have no common ancestors.

Explanation:

In evolutionary biology, the degree of similarity in molecular structures (like amino acid sequences in hemoglobin) reflects evolutionary relatedness. Fewer differences mean a more recent common ancestor. Humans and gorillas having only one different amino acid in hemoglobin shows a high degree of similarity, indicating they are closely related. Option B is wrong as they are different species. Option C is wrong as humans and gorillas evolved from a common ancestor, not one from the other. Option D is wrong as the similarity implies a common ancestor.

Answer:

A. They are closely related.