UPSC General Studies Sample Paper General Studies Sample Paper-6

  • question_answer
    What would happen if phytoplankton of an ocean is completely destroyed for some reason?
    1. The ocean as a carbon sink would be adversely affected.                                  
    2. The food chains in the ocean would be adversely affected.                                  
    3. The density of ocean water would drastically decrease.                                     
    Select the correct answer using the codes given below.                               

    A)  1 and 2

    B)  Only 2                 

    C)                 Only 3             

    D)  All of these                           

    Correct Answer: A

    Solution :

    [a] Phytoplanktons create organic compound from the carbon dioxide of atmosphere. That is why, they play role as carbon sink. They are also producer, so the source of food for ocean life.                                                 The amount of gas dissolved in the water is in turn influenced by the amount of phytoplankton (microscopic plants particularly algae), which consume\[C{{O}_{2}}\]during photosynthesis. Phytoplankton activity occurs mostly within 50 m of the surface, Distribution of phytoplanktons varies widely according to season and location. There is no relation between the density of ocean and number of phytoplankton.

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