what is respiration
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a process by which living things produce energy from food.
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All living cells in a plant, as well as those in animals, require energy for various activities of the body. For example, building up proteins from amino acids, making starch from glucose, absorbing minerals from the soil, or laying down cell walls by plant cells, are all such activities that require energy. This energy is made available by the breakdown of glucose, a simple carbohydrate. The chemical breakdown of glucose occurs by utilizing oxygen.
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