Which of the following is an example of a commensalism?
A. fungi residing in plant roots, such as endomycorrhizae
B. bacteria fixing nitrogen on the roots of some plants
C. rancher ants that protect aphids in exchange for sugar-rich honeydew
D. cattle egrets eating insects stirred up by grazing bison
Answer:D
Which of the following is an example of a commensalism?
A. fungi residing in plant roots, such as endomycorrhizae B. bacteria fixing nitrogen on the roots of some plants C. rancher ants that protect aphids in exchange for sugar-rich honeydew D. cattle egrets eating insects stirred up by grazing bison