write the mode of nutrition in amoeba with examle.

 Amoeba is a unicellular animal. Amoeba eats tiny (microscopic) plants and animals as food which floats in water in which it lives. The mode of nutrition in Amoeba is holozoic. The process of obtaining food by Amoeba is called phagocytosis ('Phagocytosis' means 'cell feeding'). The various steps involved in the nutrition of Amoeba are: ingestion, digestion, absorption, assimilation, and egestion. All the processes of nutrition are performed by the single cell of Amoeba. This is described below.

     Ingestion:

Amoeba has no mouth or a fixed place for the ingestion of food (intake of food). Amoeba ingests food by using its pseudopodia. When a food particle comes near Amoeba, then Amoeba ingests this food particle by forming temporary finger-like projections called pseudopodia around it. The food is engulfed with a little surrounding water to form a food vacuole inside the Amoeba. This food vacuole can be considered to be a 'temporary stomach' of Amoeba.

2. Digestion:

In Amoeba, food is digested in the food vacuole by digestive enzymes. The enzymes from surrounding cytoplasm enter into the food vacuole and break down the food into small and soluble molecules by chemical reactions. Thus, digestion in Amoeba takes place inside the food vacuole due to which the food dissolves (or food becomes soluble).

3. Absorption:

The digested food present in the food vacuole of Amoeba is absorbed directly into the cytoplasm of Amoeba cell by diffusion. Since Amoeba consists of only one small cell, it does not require blood system to carry the digested food. The digested food just spreads out from the food vacuole into the whole of Amoeba cell. After absorption of food, the food vacuole disappears.

4. Assimilation :

A part of the food absorbed in Amoeba cell is used to obtain energy through respiration. The remaining part of absorbed food is used to make the parts of Amoeba cell which lead to the growth of Amoeba. Thus, on assimilating food Amoeba grows in size. And then Amoeba can reproduce by dividing into two daughter cells.

5. Egestion :

Amoeba has no fixed place (like anus) for removing the undigested part of food. When a considerable amount of undigested food collects inside Amoeba, then its cell membrane suddenly ruptures at any place and the undigested food is thrown out of the body of Amoeba.

Paramecium is also a tiny unicellular animal which lives in water. Paramecium uses its hair like structures called cilia to sweep the food particles from water and put them into its mouth. The Paramecium has thin, hair-like cilia all over its body. The cilia move back and forth rapidly in water.

When the cilia present around the mouth region of Paramecium move back and forth, they sweep the food particles present in water into the mouth of Paramecium. This is the first step in the nutrition of Paramecium which is called ingestion. Ingestion is followed by other steps such as digestion, absorption, assimilation and egestion (as explained in the case of Amoeba).

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Amoebas are heterotrophs, like yourself, meaning they eat other organisms. The generally do this by "engulfing" or swarming around their prey until the prey is inside them. The food vacuole is actually bound by what was once cell membrane. They dump some digestive enzymes into this food vacuole (from an organelle called a "lysosome") and once the food is digested (broken down into smaller units), they absorb the digested food into their cytoplasm. I love the name of this process: phagocytosis

Ex:-Unicellular,red blood cells, skin cells, hair cells any part of the natural human body is made up of cells specified for that area, designed by the DNA found in the nucleus' of cells



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 well, amoeba uses all the modes of nutritions such as assimilation, digestion, ingestion, egestion, and absorption.

it uses its false feet called pseudopodia to taking in food

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its holozoic nutrition

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the mode of nurtition in amoeba is holozoic mode of nutrition.

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its holozoic

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amoeba is a heterotrophic mode ex cow

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Amoeba(sometimesamœbaorameba, pluralamoebaeoramoebas) is agenusofProtozoa

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Nutrition inAmoeba:Amoebaconsumes food with the help ofpseudopodia. Pseudopodia are temporary finger-like projections of the cell surface, which fuse over the food particle. This results in the formation of a food vacuole.

It is inside this food vacuole that complex substances are broken down into simpler ones. These are then diffused into the cell cytoplasm. The remaining undigested material is thrown out of the cell surface.

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