Organ systems.
With analogies it helps to make sentences. Cells compose tissues, as organs compose organ systems.
<span>Per glucose molecule 2 CO2 is produced during pyruvate decarboxylation (the reaction between glycolysis and the Kreb's Cycle) and 4 CO2 are produced during the Kreb's Cycle</span>
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Hydrogen and oxygen .........
Explanation:
eating less meat, wasting less food could save water worldwide