Question

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Explain Nutrition and its types​

Answer 1

Nutrition is the process of intake of nutrients from which organisms can derive energy for various life processes.

∙ Heterotrophic nutrition is the mode of nutrition in which organisms cannot synthesize their own food and derive nutrition by digesting organic matter from plants and animals. 

∙ Heterotrophic nutrition is further divided into three types depending on how the organisms derive their food.

1. Saprophytic nutrition:

∙ Organisms derive their nutrition from dead and decaying organic matter.

∙ They absorb nutrients through their body wall.

∙ The organisms depend entirely on non-living substances as a source of food.

∙ Bacteria and fungi are examples of organisms that follow saprophytic nutrition.

2. Parasitic nutrition

∙ Organisms depend on other living organisms for their nutrition.

∙ The organism on which the parasite feeds and derives its nutrition from is known as the host organism. The host organism is not benefited but is harmed in the association.

∙ Examples of parasitic organisms are several bacteria, fungi, plants (e.g. Cuscuta) and animals (e.g. tapeworm, Ascaris).

3. Holozoic nutrition:

∙ Parts of plants or animals or whole organisms are taken in as food, which is then digested to simple substances and absorbed by cells of the body.

∙ Amoeba is an organism which shows the holozoic mode of nutrition.

Answer 2

Nutrition :

Nutrition: Nutrition is the process of intake of nutrients (like carbohydrates, fats, proteins, minerals, vitamins and water) by an organism as well as the utilization of these nutrients by the organism.

Types of Nutrition:

• Autotrophic Nutrition: i. Autotrophic nutrition is the mode of nutrition in which an organism prepares its own food.
• Autotrophic Nutrition: i. Autotrophic nutrition is the mode of nutrition in which an organism prepares its own food.Heterotrophic Nutrition
• Autotrophic Nutrition: i. Autotrophic nutrition is the mode of nutrition in which an organism prepares its own food.Heterotrophic NutritionSaprophytic Nutrition
• Autotrophic Nutrition: i. Autotrophic nutrition is the mode of nutrition in which an organism prepares its own food.Heterotrophic NutritionSaprophytic NutritionHolozoic Nutrition