NEET Biology question

Not in NEET syllabus

Which one of the following is not a bioindicator of water pollution? **[AIPMT 2007]**

(A)Sludge worms
(B)Blood worms
(C)Stone fliesCorrect
(D)Sewage fungus

Answer: (C)

Solution

Sludge worms, blood worms and sewage fungus are pollution-tolerant organisms that thrive in polluted, oxygen-poor water and therefore indicate pollution. Stoneflies (e.g., *Perla*), in

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Question ID VK-129859