問題詳情
49. What is the single greatest threat to biodiversity throughout the biosphere?
(A) overharvesting of commercially important species
(B) introduced species that compete with native species
(C) pollution of Earth's air, water, and soil
(D) disruption of trophic relationships as more and more prey species become extinct
(E) habitat alteration, fragmentation, and destruction
參考答案
答案：E
難度：簡單0.727273
統計：A(0),B(0),C(1),D(0),E(8)