Bacteria that are found in the root nodules of most leguminous plants and are responsible for fixing nitrogen are known as ______________.
A) Arbuscules
B) Rhizobia
C) Parasitic fungi
D) There is no term to define these bacteria because there are so many of them.

Question

Quizplus · Accepted Answer

Rhizobia are specifically adapted bacteria that form symbiotic relationships with leguminous plants, residing in the root nodules and fixing atmospheric nitrogen into a form usable by the plant. Arbuscules are a type of fungal structure that forms mutualistic relationships with many plant species, but they do not fix nitrogen. Parasitic fungi are not involved in nitrogen fixation in plants. Option D is incorrect because there is a specific term for these bacteria, which is rhizobia.

Bacteria That Are Found in the Root Nodules of Most