Which of these species indicates very polluted water?Mayfly larvaFreshwater shrimpTubifex wormMayfly nymph
Question
Which of these species indicates very polluted water?
- Mayfly larva
- Freshwater shrimp
- Tubifex worm
- Mayfly nymph
Solution
The species that indicates very polluted water is the Tubifex worm.
Here's a step-by-step explanation:
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Mayfly larva and Mayfly nymph: These species are known to thrive in clean water. They are sensitive to pollution and their presence usually indicates good water quality.
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Freshwater shrimp: These creatures can tolerate a moderate level of pollution. However, they prefer clean water and their presence often indicates fairly good water quality.
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Tubifex worm: These worms are known to thrive in heavily polluted water. They can survive in low oxygen conditions and are often found in environments with high levels of organic matter and pollutants. Therefore, the presence of Tubifex worms usually indicates very polluted water.
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