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 ? 1 ? 2 ? 3
D) 4 ? 2 ? 3 ? 1
E) 2 ? 4 ? 3 ? 1
Answer: A
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