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  1. Nitrogen fixation is a process of

  2. A.

     Assimilation of nitrate

    B.

     Utilisation of nitrogen gas

    C.

     Conversion of organic nitrogen to proteins

    D.

     Conversion of molecular nitrogen to ammonia

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    Answer : Option D

    Explanation :

    Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a natural or an industrial means to a form of nitrogen such as ammonia. In nature, most nitrogen is harvested from the atmosphere by microorganisms to form ammonia, nitrites, and nitrates that can be used by plants.


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