Question

which of the following is not a part of the nitrogen cycle? nitrogen fixation denitrification ammonification transpiration

Explanation:

The nitrogen cycle involves processes like nitrogen - fixation (converting atmospheric nitrogen to ammonia), denitrification (converting nitrates to nitrogen gas), and ammonification (converting organic nitrogen to ammonia). Transpiration is the process of water movement through a plant and its evaporation from aerial parts, and it is not part of the nitrogen cycle.

Answer:

D. Transpiration