Question

multiple choice 2 points
which biogeochemical cycle does not include an atmospheric reservoir?
phosphorus
oxygen
carbon
nitrogen

Explanation:

The phosphorus cycle mainly involves the movement of phosphorus through the soil, water, and living organisms. Phosphorus does not have a significant gaseous phase in the atmosphere like oxygen, carbon, and nitrogen which are present in the atmosphere as $O_2$, $CO_2$, and $N_2$ respectively.

Answer:

A. Phosphorus