BIOLOGY ( please Help me)

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In both lecture and lab, the significance of water (H2O), molecular oxygen (O2), and carbon dioxide (CO2) has been emphasized with regard to their energy content or participation in metabolic oxidation and reduction reactions. This lab has demonstrated that green leaf tissue shows both (A) photosynthetic light reactions and carbon fixation and (B) aerobic respiratory activities.
For each of the three molecules (water, oxygen, and carbon dioxide) describe the context of its production or consumption in photosynthesis or respiration. Be specific with regard to cellular locations and processes where production or consumption occurs.

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