Rhizobium bacteria is found in ___ molecules of plants​

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Rhizobia are a "group of soil bacteria that infect the roots of legumes to form root nodules". Rhizobia are found in the soil and after infection, produce nodules in the legume where they fix nitrogen gas (N2) from the atmosphere turning it into a more readily useful form of nitrogen.

Explanation:

it takes hundreds of years to become stable.

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