(1), as an ecological term, is also called an independent vegetative organism, and the corresponding word is heterotrophs. Its original meaning refers to organisms that live and reproduce only with inorganic compounds as nutrients. In this classical concept, there is no difference between the two metabolic systems, that is, substrate oxidation for energy and nutrient reduction for carbon assimilation. Today, this concept has been classified according to the nutrients oxidized into energy and their oxidation forms (chemosynthetic organisms, photosynthetic organisms, inorganic oxidizing organisms and organic oxidizing organisms), according to the intake mode of carbon source nutrients and the synthesis mode of organic metabolites necessary for reduction and assimilation. And it is widely used only in the latter sense.

/view/405856.html？ wtp=tt

Heterotrophs refers to those organisms that can only use the ready-made organic matter in the external environment as energy and carbon source, ingest these organic matters into the body, convert them into their own components, and store energy. Such as: fungi living in decay and parasitism, most kinds of bacteria.

/view/ 1028779.htm