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In a polluted lake, the index of pollution is
In a polluted lake, the index of pollution is
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The correct option is C Daphnia
Daphnia is very sensitive to poor water conditions and industrial groups use Daphnia to test water quality. They are very sensitive to halide concentration, like the chloride or fluoride in tap water, which are extremely toxic to Daphnia, even more so than to fish. They are also sensitive to metal ion concentration, like sodium, potassium, magnesium and calcium, which in increased concentrations can cause immobility and death, and Daphnia are extremely sensitive to copper, zinc and most dissolved toxins (e.g., dichromate ions). They are often used to monitor water quality so that only safe water is released into the environment by industry and water treatment plants.
Daphnia is very sensitive to poor water conditions and industrial groups use Daphnia to test water quality. They are very sensitive to halide concentration, like the chloride or fluoride in tap water, which are extremely toxic to Daphnia, even more so than to fish. They are also sensitive to metal ion concentration, like sodium, potassium, magnesium and calcium, which in increased concentrations can cause immobility and death, and Daphnia are extremely sensitive to copper, zinc and most dissolved toxins (e.g., dichromate ions). They are often used to monitor water quality so that only safe water is released into the environment by industry and water treatment plants.
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