<P> Heterotrophic nutrition is the mode of nutrition in which organisms depend upon other organisms to survive . All animals and non green plants are heterotrophic . </P> <P> Heterotrophic organisms have to acquire and take in all the organic substances they need to survive . </P> <P> All heterotrophs (except blood and gut parasites) have to convert solid food into soluble compounds capable of being absorbed (digestion). Then the soluble products of digestion for the organism are being broken down for the release of energy (respiration). All heterotrophs depend on autotrophs for their nutrition . Heterotrophic plants have only four types . </P> <P> The four main types of heterotrophic nutrition are: </P>

List the two types of autotrophic and the two types of heterotrophic bacteria