crossorigin="anonymous">What Are The Modes Of Nutrition - Questions House

What Are The Modes Of Nutrition

What Are The Modes Of Nutrition

Nutrition is defined as the process of obtaining nutrients or food and utilising them. It is of two types: autotrophic and heterotrophic nutrition. The modes of nutrition of bacteria is usually autotrophic and heterotrophic both.

Autotrophic nutrition is defined as the process in which organisms prepares their food on their own.

Heterotrophic nutrition is defined as the process in which organisms obtain their food from other organisms.

Modes Of Nutrition

Autotrophic mode of nutrition further divided into:

A) Phototrophic nutrition: It is defined as the process in which organisms prepares their food in the presence of (photo means light) sunlight. Example: green plants.

B)  Chemotrophic nutrition: It is defined as the process in which organisms prepares their own food in the presence of (chemo means chemicals) chemicals such as hydrogen sulphate. Example: sulphur bacteria.

Heterotrophic mode of nutrition further divided into:

A) Holozoic: This type of nutrition involves ingestion, digestion, absorption, assimilation and egestion. Mode of nutrition in humans is Holozoic.

B) Saprophytic: It is defined as the process in which organisms feed on dead and decaying organic matters. Example: decomposers. Modes of nutrition in fungi is saprophytic as fungi depend on dead and decaying organic matters.

C) Parasitic: It is defined as the process in which organisms one organism such as parasite lives inside the other organism such as host organism to get nutrients. Example: tapeworm.

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