Which of the following is not a biological in | vedclass

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(B) Biological indicators are organisms that provide information about the quality of the environment. $Stonefly$ nymphs are highly sensitive to low o

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Stonefly

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(B) Biological indicators are organisms that provide information about the quality of the environment. $Stonefly$ nymphs are highly sensitive to low oxygen levels and pollution; therefore,their presence indicates clean,well-oxygenated water. Conversely,$Bloodworms$,$Sewage$ $fungus$,and $Sludge$ $worms$ (like $Tubifex$) are tolerant of high organic pollution and low oxygen levels,making them indicators of polluted water. Thus,$Stonefly$ is not an indicator of water pollution,but rather an indicator of clean water.

Which of the following is not a biological indicator of water pollution?

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