A. Describe the process of nutrition in Amoeba. Draw labeled diagram to show various steps of the nutrition in Amoeba.

B. What is the mode of nutrition in Amoeba known as?

A. Heterotrophic or Holozoic mode of nutrition is seen in amoeba. Amoeba is a unicellular organism. It obtains its food through its cells that is by the process of phagocytosis which means cell feeding. Amoeba ingests its food with the help of pseudopodia (false feet) and lysosomes engulf its food and throw them in food vacuole. After ingestion, digestion of the food starts by secreting digestive enzymes which acts on the food and digests it. After digestion, absorption of food takes place directly by diffusion of food by cytoplasm. After absorption, assimilation of food takes place. Food which is absorbed is used to get energy and rest is used by amoeba. Last step is egestion. In egestion the undigested food is thrown out of the by rupturing its cell membranes.