Due to which of the following organisms is th | vedclass

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(A) Anabaena is a genus of filamentous cyanobacteria that exists as plankton. It is known for its nitrogen-fixing abilities. In paddy fields (rice fie

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Anabaena

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(A) Anabaena is a genus of filamentous cyanobacteria that exists as plankton. It is known for its nitrogen-fixing abilities. In paddy fields (rice fields),Anabaena azollae (a species of Anabaena) lives in symbiotic association with the water fern Azolla. This association helps in fixing atmospheric nitrogen,which acts as a biofertilizer,thereby significantly increasing the yield of rice crops.

Due to which of the following organisms is the yield of rice increased?

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