Heterotroph

An organism which is unable to synthesize and fix its own organic carbon-based compounds. They obtain their energy from chemical fuels, and therefore depend heavily on autotrophs.  They can be separated into sub-sections according to how they obtain their energy; if the organism uses Chemical energy then it is called a chemoheterotroph, contrasted to an organism using light energy which is named a photoheterotroph. Classes of heterotrophs includes herbivores (animals that feed on plants), carnivores (the meat eaters), omnivores (meat and plants eaters) and scavengers (animals that feed on dead plants and carrion).