The processes which are essential to sustain life are called life processes.

Nutrition is the process of intake of nutrients for energy and its utilization by an organism.

Autotrophic nutritionAutotrophic nutrition

• The mode of nutrition The mode of nutrition in which organisms in which organisms prepare their own food prepare their own food using simple in using simple in organic substance is organic substance is called autotrophic called autotrophic nutrition. nutrition.

Example- All green Example- All green plants and some forms plants and some forms of bacteriaof bacteria

Heterotrophic nutrition.Heterotrophic nutrition.

• The mode of nutrition The mode of nutrition in which organism in which organism derive their food from derive their food from other organisms is other organisms is called heterotrophic called heterotrophic nutrition.nutrition.

Example- All animals Example- All animals and non-green plants.and non-green plants.

•The mode of nutrition in which The mode of nutrition in which organisms decompose dead organisms decompose dead and decaying organic matter and decaying organic matter to obtain nutrients is called to obtain nutrients is called Saprophytic nutritionSaprophytic nutrition..

Example-fungi, mushrooms Example-fungi, mushrooms and bacteriaand bacteria

•The mode of nutrition in which The mode of nutrition in which organisms live on or inside other organisms live on or inside other organisms (host) and obtain food organisms (host) and obtain food from the body of the host is from the body of the host is called parasitic nutrition.called parasitic nutrition.

Example- CucutaExample- Cucuta

•The mode of nutrition in The mode of nutrition in which organisms feed on which organisms feed on complex organic substance by complex organic substance by ingestion and digest it with ingestion and digest it with the help of enzymes is called the help of enzymes is called holozoic nutrition.holozoic nutrition.

Example- human beings, dog, Example- human beings, dog, fish etc.fish etc.