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Can photosynthesis and respiration create a cycle of energy? Why?
Answer 1:

No, photosynthesis and respiration cannot create a cycle of energy. They create a cycle of carbon, but not energy. Energy flows from the sun through photosynthesis to the plant, and then through respiration into the animal, and then, again through respiration, it becomes heat, which cannot be re-absorbed by photosynthesis and is eventually lost into space.



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