Biotic factors are all organisms that have life. They may relate to the flora, the fauna of a place and their interactions. They are classified into: 1) producers or autotrophs, organisms capable of manufacture or synthesize their own food from inorganic substances such as carbon dioxide, water and mineral salts. Plants are beings autotrofos.2) consumers or heterotrophs, organisms unable to produce their food, so eat it already synthesized. The animals are beings heterotrofos.3) decomposers, organisms that feed on organic matter in decomposition. Including yeasts, fungi, bacteria, the multicellular and cellular.
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