Amoeba

Amoeba is a single-celled organism belonging to the group of protozoans. It is a microscopic, eukaryotic organism that is found in various aquatic environments such as ponds, lakes, and rivers. Amoebas move and feed by extending their pseudopodia, which are temporary projections of the cell membrane.

Structure of Amoeba

Amoebas have a simple structure with a cell membrane that encloses the cytoplasm and a nucleus. They lack a definite shape and are capable of changing their shape continuously.

Life Cycle of Amoeba

Amoebas reproduce asexually by a process called binary fission, where the parent cell divides into two identical daughter cells. Under favorable conditions, amoebas can also form cysts to protect themselves from harsh environmental conditions.

Feeding and Movement

Amoebas are capable of engulfing food particles such as bacteria, algae, and other small organisms by surrounding them with their pseudopodia. Once the food is trapped in a food vacuole, the amoeba secretes digestive enzymes to break down the food particles and absorb the nutrients.

Amoebas move by constantly changing the shape of their body and extending their pseudopodia in the direction of movement. This form of movement is known as amoeboid movement.

Study Guide

1. Describe the structure of an amoeba.
2. Explain the process of binary fission in amoebas.
3. How do amoebas obtain and digest their food?
4. Discuss the movement of amoebas and the role of pseudopodia.
5. Compare and contrast the life cycle of amoebas under favorable and unfavorable conditions.

By studying the structure, life cycle, and behavior of amoebas, you can gain a deeper understanding of their biology and ecological significance.

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