試題詳解

20. Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of natural selection?
1. Well-adapted individuals leave more offspring than do poorly adapted individuals.
2. A change occurs in the environment.
3. Genetic frequencies within the population change.
4. Poorly adapted individuals have decreased survivorship.
(A) 2→4→1→3
(B) 4→2→1→3
(C)4→2→3→1
(D) 2→4→3→1

(E)3→4→2→1