24. 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. Genetic variation is present in a population. 
 3. Genetic frequencies within the population change.
 4. A change occurs in the environment. 

(A)4 → 1 → 3 → 2
(B)4 → 3 → 1 → 2
(C)2 → 1 → 4 → 3
(D)2 → 4 → 3 → 1
(E)2 → 4 → 1 → 3

答案:登入後查看
統計: A(4), B(3), C(0), D(3), E(14) #2344435