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  5. Forests: Our Lifeline

7th Class Science Forests: Our Lifeline Question Bank Resources on Earth - Forests and Ecosystem

  • question_answer
    Which of the following gases is increased in air in the absence of forests?

    A)  Oxygen              

    B)  Nitrogen            

    C)         Carbon dioxide  

    D)         Hydrogen

    Correct Answer: C

    Solution :

    Plants take in carbon dioxide from the air to synthesis its food.


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