The nitrogen fixing symbiotic organism present in Azolla is

Options :
  1. Nostoc
  2. Anabaena
  3. Aulosira
  4. Azospirillum


Answer and Explanation :-

Answer: Option 2

Explanation:

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But the effect of her being on those around her was incalculably diffusive: for the growing good of the world is partly dependent on unhistoric acts and that things are not so ill with you and me as they might have been, is half owing to the number who lived faithfully a hidden life, and rest in unvisited tombs.
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