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Written by Administrator
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Friday, 10 July 2009 07:34 |
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A nutrient is food or chemicals that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment. Non-autotrophic organisms typically acquire nutrients by the ingestion of foods. Methods for nutrient intake vary, with animals and protists having an internal digestive system, but plants externally digesting nutrients before ingesting them. The effects of nutrients are dose-dependent.
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