The reservoir for the gaseous type of bio-geochemical cycle exists in
1. stratosphere
2. atmosphere
3. ionosphere
4. lithosphere
Ans. (b) There are two stores of nutrients reserve pool and cycling pool. The reservoir for the gaseous type of nutrient and biogeochemical cycle (nitrogen and carbon cycle) exists in the atmosphere while the earth crust is the reservoir for the sedimentary cycle, Whereas the stratosphere ionosphere and lithosphere are the parts of the atmosphere.
