問題詳情
47. Which of the following best describes the concept of keystone species?
(A) Species that are at the top of the food chain
(B) Species that have a significant impact on the ecosystem structure and function
(C) Species that are abundant and have a high population density
(D) Species that are native to a specific ecosystem
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增