NEET Solved Paper 2016 Question 88
Question: A river with an inflow of domestic sewage rich in organic waste may result in:
Options:
A) Drying of the river very soon due to algal bloom.
B) Increased population of aquatic food web organisms.
C) An increased production of fish due to biodegradable nutrients.
D) Death of fish due to lack of oxygen.
Show Answer
Answer:
Correct Answer: D
Solution:
- When a river receives an inflow of domestic sewage rich in organic waste, it can lead to a process called eutrophication. The organic waste provides nutrients that promote the growth of algae and other microorganisms. As these organisms die and decompose, the decomposition process consumes a significant amount of dissolved oxygen in the water. This depletion of oxygen can create hypoxic conditions, which are harmful to aquatic life, including fish, leading to their death due to lack of oxygen.
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