Stonefly larvae (Plecoptera) are aquatic insects that are highly sensitive to water quality, particularly dissolved oxygen levels. They require clean, well- oxygenated water to survive. Their presence is an indicator of good water quality, while their absence often indicates pollution.
Which of the following is absent in polluted water?
Asked in WBCS Main Paper 4 2022 · Topic: Pollution (Water Pollution: Sources, common pollutants, water quality indicators (BOD, COD, DO), effects, control measures.)
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