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9th Class Science Natural resources Question Bank Natural Resources

  • question_answer
    Organisms like lichens are very sensitive to the levels of

    A) Carbon dioxide

    B) Sulphur dioxide

    C) Carbon monoxide

    D) Methane.

    Correct Answer: B

    Solution :

    Lichens are sensitive to sulphur dioxide because their efficient absorption system results in rapid accumulation of sulphur when exposed to high sulphur dioxide pollution. Since industrialisation, many lichens have become extinct.


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