Question

Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

 (a) Sulphur cycle

 (b) Phosphorus cycle

 (c) Nitrogen cycle

 (d) Carbon cycle

Answer 1

Correct option (b) Phosphorus cycle

Explanation:

 Phosphorus cycle is a sedimentary biogeochemical cycle. It describes the movement of phosphorus through the lithosphere, hydrosphere and biosphere and the main reservoir pool is lithosphere.

Atmosphere does not play any significant role in the movement of phosphorus because phosphorus and phosphorus based compounds are usually solids at the typical ranges of temperature and pressure found on earth. The production of phosphine gas occurs only in specialised, local conditions