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How balance of oxygen and carbon dioxide...

How balance of oxygen and carbon dioxide in the atmosphere is maintained?

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During photosynthesis plant uses carbon dioxide and releases oxygen. Plants also consume oxygen for respiration, but they produce more of it than they consume. Oxygen in air is used by living organisms present in air, water or soil during respiration. This shows the interdependence of plants and animals and thus the balance of oxygen and carbon dioxide in the atmosphere is maintained.
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Knowledge Check

  • What is the partial pressure of oxygen and carbon dioxide in atmospheric air ?

    A
    `p_(O_(2))` 159 mm Hg, `p_(CO_(2))`0.3 mm Hg
    B
    `p_(O_(2))` 104 mm Hg, `p_(CO_(2))`40 mm Hg
    C
    `p_(O_(2))` 40 mm Hg, `p_(CO_(2))`45 mm Hg
    D
    `p_(O_(2))` 95 mm Hg, `p_(CO_(2))`40 mm Hg

  • Green plants appear to release oxygen instead of carbon dioxide into the atmosphere during the daytime because

    A
    green plants respire during the night time
    B
    green plants respire during the daytime, but are involved in photosynthesis during the night time
    C
    the rate of photosynthesis is higher than the rate of respiration during the daytime
    D
    green plants do not respire during the night time

  • Green plants appear to release oxygen instead of carbon dioxide into the atmosphere during the daytime because

    A
    green plants respire during the night time
    B
    green plants respire during the daytime, but are involved in photosynthesis during the night time
    C
    the rate of photosynthesis is higher than the rate of respiration during the daytime
    D
    green plants do not respire during the night time

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    Assertion. Gold and platinium occur in native state. Reason. Gold and platinium are not attacked by moisture, oxygen and carbon dioxide of the atmosphere.

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