Previous year MCQs

Environment & Ecology UPPSC 2019 GS-I
Question

With reference to Eutrophication, which of the following statement(s) is/are correct ?

1) It decreases dissolved oxygen of water.
2) It is a phenomenon of nutrient enrichment of a water body.

Select the correct answer from the codes given below.

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Both 1 and 2

Detailed Solution:

The correct answer is “Both 1 and 2”.
Eutrophication leads to an overgrowth of algae and aquatic plants due to excessive nutrients (like nitrogen and phosphorus). When these organisms die and decompose, it depletes the oxygen in the water, leading to hypoxic conditions.

Eutrophication is caused by the enrichment of water bodies with nutrients, which promotes the rapid growth of algae and aquatic plants.

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