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Eubacteria : Cyanobacteria - biological classification, Biology, Class 11 Video Lecture
FAQs on Eubacteria : Cyanobacteria - biological classification, Biology, Class 11 Video Lecture
| 1. What is the biological classification of Cyanobacteria? |  |
Ans. Cyanobacteria belong to the domain Bacteria, phylum Cyanobacteria, and class Eubacteria.
| 2. What is the significance of Cyanobacteria in biology? | |
Ans. Cyanobacteria play a crucial role in various biological processes. They are important primary producers as they can perform photosynthesis and produce oxygen. They also fix atmospheric nitrogen, contributing to the nitrogen cycle. Additionally, Cyanobacteria have a symbiotic relationship with certain plants, forming specialized structures called nodules that enhance nutrient availability.
| 3. How do Cyanobacteria differ from other bacteria? | |
Ans. Cyanobacteria differ from other bacteria in several ways. They have the ability to perform oxygenic photosynthesis, producing oxygen as a byproduct. Unlike most bacteria, they possess chlorophyll a and phycobiliproteins, which help in capturing light energy for photosynthesis. Cyanobacteria also have specialized structures called heterocysts that enable them to fix atmospheric nitrogen.
| 4. Can Cyanobacteria be harmful to humans and the environment? | |
Ans. Yes, some Cyanobacteria can produce harmful toxins called cyanotoxins. These toxins can contaminate water bodies and pose risks to human and animal health. Cyanobacterial blooms, which occur when Cyanobacteria populations rapidly increase, can lead to eutrophication, depleting oxygen levels in water and harming aquatic organisms.
| 5. Why are Cyanobacteria considered important in early Earth's history? | |
Ans. Cyanobacteria played a crucial role in shaping the early Earth's atmosphere. Through photosynthesis, they produced oxygen, which eventually led to the development of an oxygen-rich atmosphere. This oxygenation of the atmosphere was a significant event in Earth's history, allowing the evolution of aerobic organisms.
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