SSC Ecology And Environment Sample Paper NCERT Sample Paper-2

  • question_answer
    Increase in concentration of toxins in higher trophic levels is called

    A)  biomagnification

    B)  bioremediation

    C)  biopiracy         

    D)  pollution

    Correct Answer: A

    Solution :

    [a] Biomagnification (or bioaccumulation) refers to the ability of living organisms to accumulate certain chemicals to a concentration larger than that occurring in their inorganic, non-living environment, or in the case of animals, in the food that they eat. Organisms accumulate any chemical needed for their nutrition. This increase can occur as a result of: ? Persistence - where the substance can't be broken down by environmental processes ? Food chain energetics - where the substance concentration increases progressively as it moves up a food chain ? Low or non-existent rate of internal degradation or excretion of the substance - often due to water-insolubility

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