UPSC General Studies Solved Paper - General Studies-2014

  • question_answer
    Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?
    1. Volcanic action          
    2. Respiration
    3. Photosynthesis           
    4. Decay of organic matter
    Select the correct answer using the codes given below.

    A)  1 and 3

    B)  Only 2

    C)  1, 2 and 4                    

    D)  All of these

    Correct Answer: C

    Solution :

    Exp. [c] Volcanic action results in the eruption of huge amount of volcanic matter and carbon dioxide; Respiration in humans and animals is a process of intake of oxygen and release of carbon dioxide; Decay of organic matter also results in the production of carbon dioxide due to the activity of the bacteria. However, photosynthesis is the activity that intakes carbon dioxide and releases oxygen in the air.

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