NEET Biology question

Not in NEET syllabus

A lake which is rich in organic waste may result in **[NEET-II 2016]**

(A)Increased population of aquatic organisms due to minerals
(B)Drying of the lake due to algal bloom
(C)Increased population of fish due to lots of nutrients
(D)Mortality of fish due to lack of oxygenCorrect

Answer: (D)

Solution

A lake rich in organic waste experiences intense microbial decomposition activity, which consumes large amounts of dissolved oxygen (raising biochemical oxygen demand), leading to oxygen depletion and consequent death of fish and

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Question ID VK-130207