plants release oxygen some time and sometime they release carbon dioxide why
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Explanation:
during night due to absence of sunlight they can't make food and thus they inhale oxygen during night time but in daytime they only inhale carbon dioxide
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Plants produce Co2 all the times as metabolic product of respiration, but when the light is available, they can use and fix some CO2 as substrate in photosynthesis. When light is available they also take up additional CO2 from the surrounding atmosphere, and one of the end products of photosynthesis is O2 ( molecular oxygen) , so when light is available, on net balance they use or fix more CO2 into other molecules than they produce.
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