2. Questions Bank
  3. 8th Class
  4. Science
  5. Pollution of Air and Water

8th Class Science Pollution of Air and Water Question Bank Pollution of Air and Water

  • question_answer
    Increasing concentration of toxic substances in the tissues of organisms at successively higher levels in a food chain is:

    A) Eutrophication   

    B) Bio magnification

    C) Global warming

    D)        Nitrogen fixation

    E) None of these

    Correct Answer: B

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