Question

The diagram/flow chart represents which of the sedimentary biogeochemical cycle?

• A. Nitrogen cycle
• B. Phosphorus cycle
• C. Oxygen cycle
• D. Sulphur cycle

Answer 1

Answer: (B)

Biogeochemical cycles are of two types:
(a) Gaseous: Biogenetic materials involved in circulation are gases e.g. N₂,O₂,CO₂ etc.
(b) Sedimentary: Biogenetic materials involved in circulation are non-gaseous e.g. P₂, Ca, S, etc forms rocks.
The flow chart represents the phosphorus biogeochemical cycle occurring in a terrestrial ecosystem. The phosphorus cycle is a sedimentary cycle and its reservoir pool is lithosphere.