Commensalism and Mutualism — Prelims Questions

Which of the following represents a commensalistic relationship?

Which of the following is an example of obligate mutualism?

In the mutualistic relationship between mycorrhizal fungi and plant roots, what does the fungus primarily provide to the plant?

A species of bird builds its nest on a tall tree. The bird gets a safe place to raise its young, and the tree is neither harmed nor benefited. This interaction is an example of:

Which of the following statements about the Rhizobium-legume mutualism is INCORRECT?

Which of the following interactions is correctly matched with its description?