22. Nitrogen fixation is a process of A.Assimilation of nitrate B.Utilisation of nitrogen gas C.Conversion of organic nitrogen to proteins D.Conversion of molecular nitrogen to ammonia
Answer: Option D Solution: 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.
