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Stages of phagocytosis in ameoba. |
| Answer» The mode of nutrition in Amoeba is holozoic. The process of obtaining food by Amoeba is called phagocytosis. The various steps involved in the nutrition of Amoeba are: ingestion, digestion, absorption, assimilation, and egestion.Ingestion - 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.Digestion - The enzymes from surrounding cytoplasm enter into the food vacuole and break down the food into small and soluble molecules by chemical reactions.Assimilation - The digested food present in the food vacuole of Amoeba is absorbed directly into the cytoplasm of Amoeba cell by diffusion. The digested food spreads out from the food vacuole into the whole of Amoeba cell. After absorption of food, the food vacuole disappears. A part of the food absorbed in Amoeba cell is used to obtain energy and the remaining part of absorbed food is used for growth and repair.Egestion - 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. | |