Q72
The main nitrogen reservoir in the biosphere is
A.
Atmosphere
AnswerB.
Ocean
C.
Organisms
D.
Rocks
Answer: Option A
Solution
Answer: Option A
Solution:
The main nitrogen reservoir in the biosphere is Atmosphere.Atmosphere is a layer of gas or layers of gases that envelop a planet and is held in place by the gravity of the planetary body.
It is composed of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%) and trace gases.