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?

[UPSC Civil Services Exam – 2021 Prelims]

(a) Carbon cycle

(b) Nitrogen cycle

(c) Phosphorus cycle

(d) Sulphur cycle


Answer: (c)        

Explanation:

  • Recently, the Government has prepared an Action Plan to make India Aatmanirbhar
  • Carbon and Nitrogen cycle are the gaseous cycles. Here, the main reservoir of nutrient is the atmosphere or the hydrosphere.
  • In sulphur cycle, nutrient is released by weathering of rocks, erosional runoff and decomposition of organic matter.
  • The sulphur cycle is mostly sedimentary but two of its compounds hydrogen sulphide (H2S) and sulphur dioxide (SO2) add a gaseous component to its normal sedimentary cycle.
  • In Phosphorus cycle, nutrients got released mainly by weathering of rocks since the Phosphorus mainly occurs as a mineral in phosphate rocks. It enters the cycle from erosion and mining activities.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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