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UPSC PYQPrelims 2021

Civil Services Examination · प्रश्न 27

In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?

  1. Carbon cycle
  2. Nitrogen cycle
  3. Phosphorus cycle
  4. Sulphur cycle
उत्तर देखें और व्याख्या

उत्तर: (C) Phosphorus cycle

व्याख्या

Phosphorus has a sedimentary cycle with no significant atmospheric reservoir; it enters ecosystems mainly through weathering of rocks.