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All living organisms require some way of obtaining energy to use in every part of their lives, be it reproduction, movement, or homeostasis. If you mean eat as in to take in outside materials for producing energy, then the answer would be no. Organisms that either eat plants or other organisms are called heterotrophs - they make energy from materials obtained from an outside means. They are mostly animals, though there are several carnivorous plant species such as the Venus Fly Trap and the Pitcher Plant which capture and digest insects. Organisms that create their own food, however, are called autotrophs and they produce their food through their own means, mostly photosynthesis. Most of these organisms are plants and algaes and through either taking in sunlight or using chemical reactions in the darker environments, they produce glucose which is then converted into energy and waste products.

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14y ago

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