Which of the following algae is symbiotic and | vedclass

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(C) $Anabaena$ is a cyanobacterium (often referred to as blue-green algae) that forms a symbiotic relationship with the water fern $Azolla$.Within the

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Anabaena

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(C) $Anabaena$ is a cyanobacterium (often referred to as blue-green algae) that forms a symbiotic relationship with the water fern $Azolla$.Within the cavities of $Azolla$ leaves,$Anabaena$ fixes atmospheric nitrogen $(N_2)$ into ammonia,which is then utilized by the plant for growth.Therefore,$Anabaena$ is the correct answer as it is both symbiotic and nitrogen-fixing.

Which of the following algae is symbiotic and nitrogen-fixing?

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