問題詳情
70. Inbreeding and small population size of a threatened species can combine to form a downward spiral for the speciesknown as a(n) _____.
(A) extinction vortex
(B) random change of allele frequencies attributable to chance
(C) random mutation
(D) accelerated evolution of new traits
(E) none of the possibilities are correct
參考答案
答案：A
難度：適中0.6
統計：A(9),B(3),C(0),D(0),E(0)