Answer :

In jar A only plant is present and plants take up the carbon dioxide present the atmospheric air. In jar B along with the plant, mice are also kept. The mice release carbon dioxide which is taken by the plants as required. In jar C only mice are present so large amount of carbon dioxide is produced.

a) In jar C the amount of CO2 would be maximum because only mice are present and no plants to use up CO2 generated.


b) The amount of CO2 would be minimum in the jar A and there is no animal present to release CO2 and the CO2 which is present in the air of the jar is also taken up by the plants.


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