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9th Class Science Natural resources Question Bank Natural Resources

  • question_answer
    The given figure represents the oxygen cycle which maintains the level of oxygen in the atmosphere. Which of the following processes will you place at X and Y in the figure?

    A)
    X Y
    Combustion Respiration
                   

    B)
    X Y
    Respiration      Transpiration

    C)
    X Y
    Photosynthesis Evaporation
                   

    D)
    X Y
    Photosynthesis Respiration
               

    Correct Answer: D

    Solution :

    During photosynthesis (X), \[C{{O}_{2}}\] and water is used by plants to form food along with release of oxygen. This oxygen and food (organic molecules) is required for respiration (Y).


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