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Questions and Answers
What characteristic distinguishes diatoms from golden algae in terms of their structure?
What characteristic distinguishes diatoms from golden algae in terms of their structure?
Which of the following statements about diatomaceous earth is accurate?
Which of the following statements about diatomaceous earth is accurate?
In which habitats can diatoms be found?
In which habitats can diatoms be found?
What role do diatoms play in oceanic ecosystems?
What role do diatoms play in oceanic ecosystems?
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How do diatoms remain suspended in the water column?
How do diatoms remain suspended in the water column?
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Study Notes
Diatoms and Golden Algae
- Group includes diatoms and golden algae (desmids), important in aquatic ecosystems.
- Found in both freshwater and marine environments, showcasing ecological diversity.
- Microscopic size allows them to float passively in water currents as plankton.
- Majority are photosynthetic, contributing to oxygen production and food webs.
Structure and Composition
- Diatom cell walls consist of two thin, overlapping shells resembling a soap box.
- Walls embedded with silica, making them indestructible and durable.
- Over billions of years, the accumulation of diatom cell wall deposits has formed ‘diatomaceous earth.’
Uses of Diatomaceous Earth
- Diatomaceous earth possesses a gritty texture, utilized in various applications.
- Employed in polishing agents, enhancing the shine of surfaces.
- Used for filtration purposes, particularly for oils and syrups, highlighting its practical importance.
Ecological Role
- Diatoms are the principal producers in oceanic environments, forming the base of marine food webs.
- Their photosynthetic activity is crucial for sustaining marine life and balancing ecosystems.
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Description
Explore the fascinating world of diatoms and golden algae, key players in aquatic ecosystems. This quiz covers their characteristics, habitats, and unique cell structure. Learn about these microscopic organisms that play an essential role in both freshwater and marine environments.
