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Feeding and Digestion in Amoeba Video Lecture | Science Class 7

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FAQs on Feeding and Digestion in Amoeba Video Lecture - Science Class 7

1. What is the feeding process of an Amoeba?
Ans. Amoebas feed by engulfing their food, typically microscopic organisms such as bacteria or algae. They extend their pseudopodia (false feet) around the prey and pull it into their cell membrane, forming a food vacuole. Digestive enzymes are then secreted into the vacuole to break down the food for absorption.
2. How does an Amoeba digest its food?
Ans. Amoebas digest their food using enzymes. Once the food is enclosed in a food vacuole, digestive enzymes are released into the vacuole to break down the food into smaller molecules. These smaller molecules can then be absorbed into the cytoplasm of the amoeba to provide nutrients for energy and growth.
3. How does an Amoeba obtain nutrients from its food?
Ans. After digesting its food, an Amoeba absorbs the nutrients through its cell membrane. The broken-down molecules from the digested food diffuse through the membrane and enter the cytoplasm of the amoeba, where they are utilized for various cellular processes, including energy production and growth.
4. What happens to the undigested waste in an Amoeba?
Ans. After absorbing the nutrients from its food, an Amoeba eliminates the undigested waste through a process called exocytosis. The undigested waste material is expelled from the cell through the cell membrane, forming a temporary opening known as the cytopyge.
5. Can an Amoeba survive without food?
Ans. Amoebas have the ability to survive for some time without food. They can enter a dormant state called cyst formation when conditions are unfavorable or when food is scarce. During this stage, the amoeba forms a protective cyst around itself and becomes metabolically inactive. Once favorable conditions return, the cyst breaks open, and the amoeba resumes its normal feeding and digestion processes.
111 videos|246 docs|28 tests

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