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7th Class Science Respiration in Organisms Question Bank Respiration in organisms

  • question_answer
    When we inhale, we breathe in air into the lungs. What do we breathe out when we exhale?

    A)  Only oxygen gas.

    B)  Only hydrogen gas.

    C)  Air that has more oxygen than inhaled air.

    D)  Air that has more carbon dioxide than inhaled air.

    Correct Answer: D

    Solution :

    During exhalation or expiration we breathe out air rich in carbon dioxide.


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