Question

what is nutrition ? Explain the types of nutrition in different living organisms.​

Answer 1

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Nutrition is the process to obtain and utilize food or nutrients. It is mainly divided into two categories autotrophic (organisms prepare their own food) and heterotrophic (organisms obtain food from other organisms).

• Autotrophic mode of nutrition is further divided into two categories such as:

1. Phototrophic

Organisms prepare their own food in the presence of sunlight, water and carbon dioxide e.g., green plants.

2. Chemotrophic

Organisms prepare their own food in the presence of chemicals such as nitrate, hydrogen sulphate, iron etc, e.g., sulphur bacteria

• Heterotrophic mode of nutrition is further divided into three categories such as:

1. Holozoic

Animals eat their whole food. It includes five stages of digestion such as ingestion, digestion, absorption, assimilation and egestion e.g., humans.

2. saprophytic

Organisms feed on dead and decaying organic matters. In this mode, organisms first convert the complex food into the simple form and then ingests them e.g., decomposers.

3. Parasitic

Organisms obtain food from other living organisms. In this mode, one organism (parasite) lives inside the other organism (host organism) and derive nutrients

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Answer 2

Question :-

what is nutrition ? Explain the types of nutrition in different living organisms.

Answer :-

Nutrition is the process of taking in food and converting it into energy and other vital nutrients required for life.

Types of Nutrition

Broadly, there are two types of nutrition among living organisms, namely :

1. Autotrophic nutrition
2. Heterotrophic nutrition

Autotrophic nutrition = Autotrophic nutrition is a process where an organism prepares its own food from a simple inorganic material like water, mineral salts and carbon dioxide in the presence of sunlight.

Heterotrophic nutrition = Heterotrophic nutrition is a mode of nutrition in which organisms depend upon other organisms for food to survive.

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