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Question
Eutrophication leads to death of fish due to ______.
Options
increased O2 concentration
decreased O2 concentration
increased algal contents
decreased algal contents
MCQ
Fill in the Blanks
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Solution
Eutrophication leads to death of fish due to decreased O2 concentration.
Explanation:
BOD measures the amount of oxygen required by microorganisms to decompose organic matter in water. A decreased BOD means there is less organic pollution and thus more dissolved oxygen (O2) available in the water. High oxygen content indicates better water quality and less microbial activity to consume oxygen. Conversely, a high BOD would indicate more organic pollution and higher microbial activity consuming oxygen.
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