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8.Microbes in Human Welfare
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Azolla is used as a biofertiliser because it

A

Has association of mycorrhiza

B

Multiplies at faster rate to produce massive biomass

C

Has association of nitrogen-fixing Rhizobium

D

Has association of nitrogen-fixing cyanobacteria

(AIIMS-2018)
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Solution

Azolla is a pteridophyte and it is used as a biofertiliser because it has association with nitrogen-fixing cyanobacteria called Anabaena azollae.

Standard 12
Biology
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