A free living bacteria capable of fixing nitrogen is
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Two kinds of nitrogen-fixing bacteria are recognized. The first kind, the free-living(nonsymbiotic) bacteria, includes the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium
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Explanation:
Rhizobiums is a free living symbiotic bacteria as a nitrogen fixator.....
It fixes nitrogen in leguminous plant.
This bacteria lives association with leguminous plants called root nodules....
This root nodules penetrate into plant tissues and multiplies in cortex cells of plant....
Plant gives mineral and nutrition to bacteria and bacteria does nitrogen fixation for plants......
Another ex............
Anabaena, Azotobacter and Nostoc..........
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