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Nutrition is the mode of intake of food by the organism and its utilisation by the body. All organisms need food to perform their life processes. Food comprises of different nutrients which include carbohydrates, proteins, fats, vitamins and minerals. Food provides us energy to grow, repair the damaged parts in our body. Living organisms include microorganisms, plants and animals.

Plants obtain their nutrition by various modes. The mode of nutrition in plants can be autotrophic mode or heterotrophic mode. Plants can be classified into autotrophs and heterotrophs.

Autotrophic plants can synthesise their own food by the process of photosynthesis. Heterotrophic plants cannot synthesise food on their own but depend on other organisms for their nutrition. Heterotrophic plants can be further classified into parasites, saprophytes and symbiotic plants. 
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