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UPSC CSE Prelims Biogeochemical Cycles Flashcards

Master 7 biogeochemical cycles concepts for the UPSC CSE Prelims.

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Question

Consider the following processes:

  1. Photosynthesis
  2. Respiration
  3. Decay of organic matter
  4. Volcanic action Which of the above add carbon dioxide to the carbon cycle on Earth?

Question

Complete the stages of the Nitrogen Cycle:

In the nitrogen cycle, the conversion of ammonia to nitrite and then nitrate is called . The reduction of nitrates back into nitrogen gas (N2) is known as , while the conversion of organic nitrogen from dead organisms into ammonia is called .

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