Question

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Nitrogen fixation for plants occurs in what organisms?​

Answer 1

Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants, ...

Answer 2

Two kinds of nitrogen-fixing microorganisms are recognized: free-living nonsymbiotic bacteria, including the cyanobacteria or blue-green algae Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic symbiotic bacteria such as Rhizobium, associated with leguminous plants,.

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