Most Nitrogen-Fixing Bacteria Symbiotically Associated with Plants are Called

Question

Most nitrogen-fixing bacteria symbiotically associated with plants are called
A) bacteroids.
B) mycorrhizae.
C) rhizobia.
D) symbiodinia.

Accepted Answer

Nitrogen-fixing bacteria symbiotically associated with plants are commonly known as rhizobia. These bacteria can form nodules on the roots of leguminous plants and fix atmospheric nitrogen into a form that can be used by the plant for growth. Bacteroids are a type of rhizobia that live inside the nodule and carry out nitrogen fixation. Mycorrhizae are a different type of plant-microbe symbiosis that usually involves fungi rather than bacteria. Symbiodinia is not a valid term.