問題詳情
32. Which of the following is an example of a commensalism?
(A) fungi residing in plant roots, such as endomycorrhizae
(B) rancher ants that protect aphids in exchange for sugar-rich honeydew
(C) bacteria fixing nitrogen in plants
(D) insects pollinate flowers
(E) cattle egrets eating insects stirred up by grazing bison
參考答案
答案：E
難度：困難0.25
統計：A(1),B(0),C(4),D(1),E(2)