Question

Rhizobium is a ___________________ (group of microorganism)

Answer 1

nitrogen-fixing bacteria that occur either as free-living soil bacteria or in interaction with the roots of leguminous plants. Cohabitation leads to the development of root nodules.

Kingdom: Bacteria

Phylum: Proteobacteria

Class: Alphaproteobacteria

Order: Rhizobiales

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Answer 2

Rhizobia are a paraphyletic group that fall into two classes of proteobacteria—the alphaproteobacteria and betaproteobacteria.