Azolla is a free floating, aquatic fern found on water surfaces having a cyanobacterial symbiotic association with ______

Anabena

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Nostoc

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Azatobacter

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Azospirillum

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Solution

The correct option is A Anabena

Azolla is a free floating, aquatic fern found on water surfaces having a cyanobacterial symbiotic association with Anabaena.

It is a live floating nitrogen factory using energy from photosynthesis to fix atmospheric nitrogen.

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