問題詳情
25. Two species of frogs belonging to the same genus occasionally mate, but the embryos stop developing after a day and thendie. These two frog species separate by ______.
(A) gametic isolation
(B) reduced hybrid fertility
(C) hybrid breakdown
(D) mechanical isolation
(E) reduced hybrid viability
參考答案
答案：E
難度：非常困難0.181818
統計：A(2),B(3),C(1),D(1),E(2)