Which of the following organisms derives ener | vedclass

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(A) $N_2$ fixation is a process where atmospheric nitrogen is converted into ammonia. $Anabaena$ is a genus of filamentous cyanobacteria that exists a

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Anabaena

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(A) $N_2$ fixation is a process where atmospheric nitrogen is converted into ammonia. $Anabaena$ is a genus of filamentous cyanobacteria that exists as plankton. These organisms are photosynthetic,meaning they use sunlight as an energy source to perform metabolic activities,including nitrogen fixation. $Azotobacter$ and $Bacillus$ are free-living soil bacteria that are heterotrophic. $Rhizobium$ is a symbiotic bacterium that obtains energy from the host plant's carbohydrates.

Which of the following organisms derives energy for $N_2$ fixation through photosynthesis?

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