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  1. Nitrogen Fixation is carried out primarily by

    2. A.

     Plants
    B.

     Humans
    C.

     Consumers
    D.

     Bacteria

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    Answer : Option D

    Explanation :

    Nitrogen fixation is carried out naturally in soil by microorganisms termed diazotrophs that include bacteria such as Azotobacter and archaea. Some nitrogen-fixing bacteria have symbiotic relationships with plant groups, especially legumes.

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