Which of the following organisms derives ener | vedclass

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(A) $1$. $N_2$ fixation is the process of converting atmospheric nitrogen into ammonia.$2$. $Anabaena$ is a cyanobacterium (blue-green alga) that perf

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Anabaena

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(A) $1$. $N_2$ fixation is the process of converting atmospheric nitrogen into ammonia.$2$. $Anabaena$ is a cyanobacterium (blue-green alga) that performs oxygenic photosynthesis.$3$. It utilizes the energy derived from photosynthesis to fuel the energy-intensive process of nitrogen fixation.$4$. $Azotobacter$ and $Bacillus$ are free-living aerobic bacteria that obtain energy from organic compounds (chemoheterotrophs).$5$. $Rhizobium$ is a symbiotic bacterium that obtains energy from the host plant's carbohydrates.$6$. Therefore,$Anabaena$ is the correct answer as it is a photosynthetic nitrogen fixer.

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

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