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hmm. If i understood you correct then plants use their own food because they cant photosynthesize at night. Alternatively, they respire just as animals (and humans) do, they take in oxygen and burn (small amounts) sugars they produce during sunlight, and release carbon dioxide and energy required to grow and reproduce.(note that plants dont produce food to use it during sunlight, because when they produce food they already produce ATP energy)

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16y ago

What else can I help you with?