NEET Biology question

Not in NEET syllabus

A lake with an inflow of domestic sewage rich in organic waste may result in **[AIIMS 2007]**

(A)Drying of the lake very soon due to algal bloom
(B)An increased production of fish due to lot of nutrients
(C)Death of fish due to lack of oxygenCorrect
(D)Increased population of aquatic food web organisms

Answer: (C)

Solution

Sewage rich in organic waste and nutrients triggers excessive algal growth (eutrophication); when this algae and organic matter decompose, dissolved oxygen in the water is rapidly

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Question ID VK-129904