Question

explain amoeba is hetrotrophic mode of nutrition

Answer 1

Amoeba obtains its nutrition in heterotrophic mode. Both the anabolic and catabolic functions are carried out in the same cell. Amoeba feeds on plankton and diatomspresent in water. It can form arm- like structures called pseudopodia, extending from any part of its body as it is shapeless. When it senses food in its surroundings it extends its pseudopodia in that direction and moves towards it. Then it engulfs the food with its pseudopodia. When the food enters its body the amoeba forms a food vacuole around it which contains certain enzymes to digest the food. When the food is digested the unwanted waste is released through its body surface.

Answer 2

Answer:

Steps of Nutrition in amoeba –

a) Formation of pseudopodia – When Amoeba comes in contact with a food particle, it forms pseudopodia which envelops food particles.

b) Ingestion – The tips of pseudopodia fuse with each other, together with variable amount of food particles and water, forms food vacuole, this process is known as ingestion.

c) Digestion – The vacuoles are surrounded by lysosomes which fuses with vacuole and digest the food particles present in vacuole.

d) Exocytosis – The soluble products of digestion are passed out into due cytoplasm from the food vacuole. And the remaining undigested materials are passed out of the body with the help of a process called exocytosis.