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Protozoa - Diversity Video Lecture - Class 11
FAQs on Protozoa - Diversity Video Lecture - Class 11
| 1. What are protozoa? |  |
Ans. Protozoa are single-celled eukaryotic organisms that belong to the Kingdom Protista. They are microscopic in nature and are found in various habitats, including freshwater, marine environments, and soil.
| 2. How do protozoa reproduce? | |
Ans. Protozoa reproduce through various methods such as binary fission, multiple fission, budding, and sexual reproduction. Binary fission is the most common mode of reproduction, where a single cell divides into two identical daughter cells.
| 3. What is the significance of protozoa in the ecosystem? | |
Ans. Protozoa play a crucial role in the ecosystem as they are important decomposers. They help in breaking down dead organic matter, recycling nutrients, and maintaining the balance of nutrients in the environment. Additionally, some protozoa are also important in controlling populations of bacteria and algae.
| 4. What are the different types of locomotory structures in protozoa? | |
Ans. Protozoa exhibit various locomotory structures, including cilia, flagella, pseudopodia, and non-motile forms. Cilia are short, hair-like projections that cover the entire surface of the cell and help in movement. Flagella are long whip-like structures that aid in swimming. Pseudopodia, also known as false feet, are temporary extensions of the cell membrane that enable the organism to move and capture food particles.
| 5. Can protozoa cause diseases in humans? | |
Ans. Yes, some protozoa can cause diseases in humans. Examples include Plasmodium, which causes malaria, and Trypanosoma, which causes sleeping sickness. These diseases are transmitted through vectors such as mosquitoes and tsetse flies. Additionally, protozoa like Giardia and Entamoeba can cause gastrointestinal infections in humans.
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Oct 14, 2025
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