Science, asked by birendrayadavbk2332, 11 months ago

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Answered by Anonymous
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Answer:

4)Azotobacter and archaea

5) Antibiotics medicine which is used for destroying bacteria and curing infections.

Explanation:

4)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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