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Which of the following pairs is a sedimentary type of biogeochemical cycle?

1. oxygen and nitrogen
2. phosphorus and sulphur
3. phosphorus and nitrogen
4. phosphorus and carbon dioxide

Correct answer: phosphorus and sulphur

Solution

Phosphorus is a classic sedimentary cycle because it lacks a major atmospheric phase and cycles through rocks, soil, and water. Sulphur is also commonly treated as sedimentary in this context because it is largely stored in rocks and marine sediments, even though it can have some atmospheric movement.

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