Which of the following biogeochemical cycles has a major re…

Biology Ecosystem Decomposition Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 20, 2026

Which of the following biogeochemical cycles has a major reservoir in sedimentary rock?

Carbon cycle

Nitrogen cycle

Phosphorus cycle / Sulphur cycle

More than one cycle

Text Solution

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The correct answer is:

Carbon cycle → Major reservoir in carbonate rocks (limestone, sedimentary rock).

Phosphorus cycle → Major reservoir in sedimentary rocks and minerals, since phosphorus has no significant atmospheric phase.

Sulphur cycle → Also has large reservoirs in sedimentary rocks (e.g., gypsum, pyrite).

Nitrogen cycle → Major reservoir is the atmosphere (N₂ gas), not sedimentary rock.

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