問題詳情
20.tWhich of the following observations is not helpful for the inference of natural selection?
(A)tMembers of a population do not vary in their traits.t.
(B)t Traits are inherited from parents to offspring.
(C)tAll species are capable of producing more offspring than their environment can support.
(D)tOwing to lack of food or other resources, many of these offspring do not survive.
參考答案
答案：A
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中