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2015-04-26T15:31:43+05:30

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During respiration oxygen is used and carbon di oxide is given out..
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2015-04-26T21:20:11+05:30

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In respiration, O2 is required to enter cells, while waste Co2 must be removed. The opposite is true for photosynthesis in plants,in which Co2 enters plant cell and O2 is released. Gas exchange is a biological process through which different gases are transferred in opposite directions across a specialized respiratory surface.
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