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How do Amoeba obtain their nutrition?

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Amoeba envelops its food through the process of endocytosis or phagocytosis, where pseudopodia are created by flexibility of the plasma membrane. 

The pseudopodia is the temporary arm- like projection in amoeba that helps collect the nutrition, alter its size and shape and acts as an organ of locomotion. Amoeba takes in food using temporary finger-like extensions of the cell surface which fuse over the food particle forming a food vacuole. Inside the food vacuole, complex 

substances are broken down into simpler ones which then diffuse into cytoplasm.

The remaining undigested material is moved to the surface of the cell and thrown out. 

The complete phagocytosis process includes intake, digestion, absorption, assimilation and egestion process.

Nutrition in amoeba: 

Diagrammatic illustration :

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