Question

Q.6 Describe with the help of labelled diagram how feeding and digestion in amoeba takes place.

Answer 1

Digestion in amoeba is intracellular taking place within the cell. The food taken in remains in a food vacuole or gastric vacuole formed by the cell membrane and small part of the cytoplasm. The vacuoles are transported deeper into the cells by cytoplasmic movements. Here they fuse with lysosomes that contain enzymes.

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Answer 2

Answer:

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Amoeba is a single-celled organism found in puddles, lake water, pond water etc. It has a cell membrane, a round nucleus, and many small vacuoles.

We know that animals eat through their mouth. But how does a small organism like Amoeba feed itself?

Amoeba can constantly change its shape. It forms finger-like projections called pseudopodia(meaning false feet). Pseudopodia help the Amoeba in moving and capturing food.

When an Amoeba senses its prey, it pushes out its pseudopodia around its prey and engulfs it. The food thus eaten gets trapped in the food vacuole. An Amoeba feeds on algae, rotifiers, protozoans, and even other small Amoeba.

How does the digestion of food occur in Amoeba?

Digestive juices such as amylase and protease are secreted inside the food vacuole in Amoeba. Theses juices act on the food and break it down into smaller components. Amylase breaks down complex carbohydrates into simple sugars, while protease breaks down proteins to simpler substances. The digested food is later absorbed by Amoeba for growth, maintenance, and multiplication. The waste material or undigested food is then expelled out of the body using pseudopodia

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