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  • In its most basic representation, usually described as any living thing. An organism is composed of a system of organs that operate independent of one another but ultimately must work together for the survival of the living thing. Organisms, which can be unicellular or complex, are capable of reproduction, evolution, and subsistence. Examples of single-celled organisms include bacteria, protists, and yeast. Examples of complex organisms, which at a minimum contain more than one cell and at a maximum billions of cells, include plants, animals, and human beings. Some sociological theories use the term metaphorically to describe their systems.


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