In a river, if its BOD is high, then:
Correct answer: A. River is polluted
- A. River is polluted
- B. River is not polluted
- C. River is day
- D. None of these
Explanation
A high BOD means microorganisms are consuming large amounts of dissolved oxygen while decomposing organic matter, which is a common sign of organic pollution. Severe oxygen depletion can harm aquatic life.
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Practise Forest Ecology
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