Name: The Seven Life Processes
Uploaded: 2019-07-19
Duration: 3 min 51 s
Description: What is the difference between a living and non living being? The living being has different processes which is essential for it to sustain. Check this video to know what are they

Question

Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.

Accepted Answer

The mode of nutrition in Amoeba is holozoic nutrition, and they feed on microscopic plants and animals that are present in the water where the Amoebae live. The process by which Amoeba obtains its food is called phagocytosis. It has been shown in the following figure:

This process occurs in the following steps:

i) Ingestion- It is the step in which the Amoeba capture the food present near them. They do not have a mouth and hence extend their cell membrane into finger-like projections called pseudopodia. A small amount of water is also engulfed into the body, which turns into the food vacuole. It is also known as temporary stomach.

ii) Digestion- The enzymes present in the cytoplasm is released into the food vacuole, where the food is digested into small and soluble molecules.

iii) Absorption- The digested food in the form of small and soluble molecules is absorbed into the cytoplasm of the Amoeba by the process of diffusion. Post absorption of food, the food vacuole disappears.

iv) Assimilation- A part of the food absorbed is used for obtaining energy through respiration. The rest of it is used for the growth of Amoeba, post which, the Amoeba divided to form daughter cells.

v) Egestion- The Amoeba does not have any specialised region for removal of undigested food. When the undigested food accumulates in large amount, the cell membrane ruptures at any point to release the waste.

Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.

Important Questions on Life Processes

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