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Questions and Answers
What is the primary importance of dissolved oxygen (DO) mentioned in the text?
What is the primary importance of dissolved oxygen (DO) mentioned in the text?
- It is a measure of the amount of oxygen dissolved in water.
- It is essential for plant growth in water bodies.
- It indicates the purity of water.
- It determines the quality of water for aquatic life. (correct)
What happens when more oxygen is consumed than produced in a water body?
What happens when more oxygen is consumed than produced in a water body?
- DO levels decline, and sensitive animals may move away, weaken, or die. (correct)
- DO levels remain constant, and aquatic life is unaffected.
- DO levels increase, and sensitive animals thrive.
- DO levels fluctuate, and aquatic life adapts to the changes.
Which factor does NOT affect the DO levels in water?
Which factor does NOT affect the DO levels in water?
- Salinity (correct)
- Water temperature
- Altitude
- Seasonal changes
Which statement is true about the relationship between water temperature and DO levels?
Which statement is true about the relationship between water temperature and DO levels?
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How do DO levels vary with altitude?
How do DO levels vary with altitude?
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