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Kingdom Protista: Dinoflagellates Video Lecture | Biology Class 11 - NEET
FAQs on Kingdom Protista: Dinoflagellates Video Lecture - Biology Class 11 - NEET
| 1. What are dinoflagellates? |  |
Dinoflagellates are a group of single-celled organisms that belong to the Kingdom Protista. They are characterized by two flagella, or whip-like appendages, that they use for movement. Dinoflagellates are typically found in marine environments and play important roles in marine ecosystems as both primary producers and consumers.
| 2. What is the significance of dinoflagellates in marine ecosystems? | |
Dinoflagellates are crucial components of marine ecosystems. They are primary producers, meaning they use photosynthesis to convert sunlight into energy and produce oxygen. Additionally, dinoflagellates serve as a food source for many marine organisms, including zooplankton and larger marine animals. Some species of dinoflagellates are also responsible for harmful algal blooms, which can have negative impacts on marine life and human health.
| 3. How do dinoflagellates reproduce? | |
Dinoflagellates reproduce through a process called binary fission, where one cell divides into two identical daughter cells. This process can occur rapidly, leading to population explosions and the formation of large blooms. Some dinoflagellate species can also undergo sexual reproduction, which involves the fusion of two cells and the exchange of genetic material.
| 4. Are all dinoflagellates photosynthetic? | |
No, not all dinoflagellates are photosynthetic. While many dinoflagellate species are capable of photosynthesis and obtain energy from sunlight, there are also non-photosynthetic or heterotrophic dinoflagellates. These heterotrophic species obtain nutrients by consuming other organisms or organic matter.
| 5. Can dinoflagellates be harmful to humans? | |
Yes, some species of dinoflagellates can produce harmful toxins that can have negative effects on human health. When these toxins accumulate in shellfish or fish, consuming them can lead to conditions such as paralytic shellfish poisoning or ciguatera fish poisoning. Additionally, the presence of certain dinoflagellate blooms can cause respiratory problems or irritate the skin and eyes of individuals who come into contact with the water.
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