Why is a plant called an autotroph?

Plants are autotrophic due to their ability to synthesize organic matter from simple inorganic compounds. Autotrophs can be divided into photosynthetic (photoautotrophs) and chemosynthetic (chemotrophs). Photosynthetics synthesize organic substances from carbon dioxide and water using sunlight into glucose and amino acids. Chemosynthetics synthesize organic compounds from oxidized mineral salts, ammonia, iron oxide and hydrogen sulfide absorbed from the soil.



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