4th Class Science Plants Question Bank Plants

  • question_answer The substance X releases _______,

    A)  Oxygen at day time

    B)  Water vapour at day time

    C)  Carbon dioxide at night

    D)  All of these

    Correct Answer: D

    Solution :

    Leaves have tiny pores called stomata. Stomata release water vapour and oxygen at day time when photosynthesis occurs. At night, plants take in oxygen and release carbon dioxide.

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