explain about nitrogen cycle
Answers
Answer:
the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
Explanation:
Nitrogen cycle: ❤❤☺☺
i. Approximately 78% of air is nitrogen and it is a part of many molecules essential to life like proteins, nucleic acids (DNA and RNA), ATP, and some vitamins.
ii. Neither plants nor animals can use atmospheric nitrogen. Plants or animals use nitrogen when it is fixed by nitrogen-fixing bacteria present in the root nodules of pulses plants.
iii. These organisms convert fixed nitrogen into ammonia. After that other bacteria convert ammonia into nitrate, in a process called nitrification. It is two steps process. In the first step, Nitrosomonas convert ammonia into nitrite. In the second step, Nitrobacter converts nitrite into nitrate. This nitrate is then consumed by plants.
iv. Thus, nitrate is the usable form of nitrogen. Through the process of denitrification by denitrifying bacteria converts nitrates nitrogen gas which is released into the atmosphere. This complete the cycle.
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