Which one is used as a biofertilizer?

Nostoc

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Funaria

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Volvox

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Rhizopus

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Solution

The correct option is A Nostoc
Nostoc is a Blue Green algae. It is a unicellular organism. It is used as nitrogen fixing bacteria. It fixes atmospheric nitrogen into ammonia and make it available to the plants. It does this as free-living bacteria as well as in symbiotic association. Hence, it is used as biofertilizer by increasing the amount of nitrogenous compound in the soil.
Thus, the correct answer is 'Nostoc.'

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