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

  • question_answer
    Which of these is the bio-indicator of air pollution?

    A)  Algae                                   

    B)                                         Ferns   

    C)                         Mushrooms                     

    D)                         Lichens

    Correct Answer: D

    Solution :

    The bio-indicator of air pollution is lichens. Lichens are a good indicator of the level of pollution as some lichens are very sensitive and cannot grow where air pollution is above a certain level.


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