Write a brief note on heterotrophic nutrition.

Explanation

1) Some organisms depends on other organisms for their food. This type of nutrition is called as heterotrophic nutrition.
2) There are four main types in heterotrophic nutrition. as i) Holozoic nutrition ii) Saprotrophicnutrition
iii) Parasitic nutrition iv) symbiotjc nutrition
i) Holozoic nutrition : It means animals which eat their food whole. Here the complex food materials are digested in digestive track. Ex : Man
i) Saprotrophic nutrition : Here organisms feed on dead organic remains of other organisms Ex : decomposers
iii) Parasitic nutrition : Organisms obtain food from Host which is called as parasite. These may be endo or ecto parasite . Ex : tape worm, leech
iv) Symbiotic nutrition : Two or more organisms have close association for long periods and share and shelter. Ex : Rizobium - leguminous plants