NEET > Biology Class 11 > Detailed Overview: Kingdom Protista
Detailed Overview: Kingdom Protista Video Lecture - Biology Class 11 - NEET
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FAQs on Detailed Overview: Kingdom Protista Video Lecture - Biology Class 11 - NEET
| 1. What is Kingdom Protista? |  |
Ans. Kingdom Protista is a biological classification that includes a diverse group of eukaryotic organisms. It is considered a kingdom because it consists of organisms that do not fit into the other four kingdoms (Animalia, Plantae, Fungi, and Monera). Protists are typically unicellular but can also be multicellular. They exhibit a wide range of characteristics and can be found in various habitats, including freshwater, marine environments, and even within other organisms.
| 2. What are the main characteristics of Kingdom Protista? | |
Ans. The main characteristics of Kingdom Protista include being eukaryotic, meaning their cells have membrane-bound organelles such as a nucleus. They are usually single-celled but can also exist as colonies or even multicellular organisms. Protists have a wide range of nutritional modes, including autotrophic (photosynthetic), heterotrophic (feeding on other organisms), and mixotrophic (combining both). They exhibit a diverse array of structures, from flagella and cilia for movement to pseudopodia for engulfing food.
| 3. How do protists reproduce? | |
Ans. Protists can reproduce through various methods. The most common methods are binary fission, where a single cell divides into two identical daughter cells, and multiple fission, where a single cell divides into multiple daughter cells. Some protists also reproduce sexually through processes such as conjugation, where genetic material is exchanged between two individuals. Additionally, some protists can reproduce through spore formation, where specialized reproductive cells called spores are released and can develop into new individuals under favorable conditions.
| 4. What are the ecological roles of protists in the environment? | |
Ans. Protists play significant ecological roles in various environments. They are crucial in nutrient cycling, as they can act as decomposers, breaking down organic matter and returning nutrients to the ecosystem. Protists also serve as primary producers in aquatic environments, performing photosynthesis and contributing to the food chain. They can serve as prey for larger organisms and also act as symbiotic partners, forming mutually beneficial relationships with other organisms, such as corals and lichens.
| 5. Can protists cause diseases in humans? | |
Ans. Yes, some protists can cause diseases in humans. Examples include Plasmodium, the protist responsible for malaria, and Giardia lamblia, which causes giardiasis. These protists are transmitted through vectors or contaminated water and can lead to severe health issues. However, it is important to note that not all protists are harmful to humans, and many protists are beneficial or have neutral effects in terms of human health.
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268 videos|544 docs|326 tests
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Timeline
| 00:00 | Kingdom Protista |
| 00:51 | Chrysophytes |
| 01:51 | Dianoflagellates |
| 02:25 | Question 1 |
| 02:41 | Euglenoids |
| 03:21 | Slime Moulds |
| 03:52 | Protozoans |
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