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NEET Previous Year Question

$A nitrogen-fixing microbe associated with Azolla in rice field is$

Topic: NEET PYQ

Answer: B. Full step-by-step solution below.

A $Spirulina$
B $Anabaena$
C $Frankia$
D $Tolypothrix$

Correct answer: B

Solution

(b) Anabaena azollae is a nitrogen-fixing cyanobacterium that lives symbiotically in the water fern Azolla, commonly used in rice fields as a biofertilizer.

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