Podcast
Questions and Answers
What characteristic is unique to eubacteria?
What characteristic is unique to eubacteria?
Which of the following describes cyanobacteria?
Which of the following describes cyanobacteria?
What role do chemosynthetic autotrophic bacteria play in the ecosystem?
What role do chemosynthetic autotrophic bacteria play in the ecosystem?
What types of environments can cyanobacteria inhabit?
What types of environments can cyanobacteria inhabit?
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Which structures allow some cyanobacteria to fix atmospheric nitrogen?
Which structures allow some cyanobacteria to fix atmospheric nitrogen?
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Study Notes
Eubacteria (True Bacteria)
- Eubacteria are diverse, with thousands of different types.
- They have rigid cell walls.
- Some are motile, having flagella.
Cyanobacteria (Blue-Green Algae)
- Similar to green plants, they have chlorophyll a.
- They are photosynthetic autotrophs.
- They exist as unicellular, colonial, or filamentous organisms.
- Found in freshwater, marine, and terrestrial environments
- Colonies are often encased in a gelatinous sheath.
- They frequently form blooms in polluted water bodies.
- Some species fix atmospheric nitrogen in specialised cells called heterocysts (e.g., Nostoc, Anabaena).
Chemosynthetic Autotrophic Bacteria
- Chemosynthetic bacteria oxidize inorganic substances (e.g., nitrates, nitrites, ammonia).
- They utilize the released energy to produce ATP.
- Crucial in nutrient recycling, involving nitrogen, phosphorus, iron, and sulfur.
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Description
This quiz covers the fascinating world of bacteria, focusing on Eubacteria, Cyanobacteria, and Chemosynthetic Autotrophic Bacteria. Explore their diverse structures, functions, and ecological roles, including photosynthesis and nitrogen fixation. Test your knowledge on these essential microorganisms that play critical roles in our environment.
