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OpenStudy (anonymous):

In the carbon-oxygen cycle, carbon dioxide is used for _____ and oxygen is used for _____. respiration, photosynthesis ozone, respiration photosynthesis, respiration evaporation, condensation

OpenStudy (anonymous):

anyone help please..

OpenStudy (kosonge):

id say C because plants need the carbon to complete a cycle of photosynthesis and we need the oxygen so we would be bringing respiration to our lungs with the oxygen the plants provide. @pkyaw

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