Gram-Negative Nitrogen-Fixing Bacteria Found in Association with Plant Roots Are

question 18

Multiple Choice

Gram-negative nitrogen-fixing bacteria found in association with plant roots are

• A) betaproteobacteria.
• B) cyanobacteria.
• C) gammaproteobacteria.
• D) alphaproteobacteria.
• E) deeply branching bacteria.

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