問題詳情

19.Which of the following statements best represents the type of "evolutionary fine - turning" mentioned in line1?
(A)Different shapes of bills have evolved depending on the available food supply
(B)White - wing crossbills have evolved from red crossbills
(C)Newfoundland's conifers have evolved small cones
(D)Several subspecies of crossbills have evolved from two species

參考答案

答案:A
難度:簡單0.777778
統計:A(7),B(1),C(0),D(0),E(0)

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