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MGIMS WARDHA MGIMS WARDHA Solved Paper-2003

  • question_answer
    As insecticides reach at higher trophic level in food chain their concentration :

    A)  increases                           

    B)  become irregular

    C)  remain constant             

    D)  decreases

    Correct Answer: A

    Solution :

                     Toxic pesticides as BHC and DDT etc., are not easily degraded and are long lasting in the environment. They show biological             magnification or food chain   concentration   (i.e.   the  continuous increase in concentration of a toxicant at   at successive trophic levels in a food chain).


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