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(By Examveda Team)

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.