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  4. Select the aquatic fern among the following options.

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Q. Select the aquatic fern among the following options.

NTA AbhyasNTA Abhyas 2022

Solution:

Salvinia is an aquatic fern which is called as an aquatic weed. Azolla is also a water fern that performs nitrogen fixation through its association with Anabaena, and it has the capacity to fix atmospheric nitrogen.