Paper 1 · People, Development and Environment
UGC NET December 2022 (12.03.2023) Shift-II (Management)
An eutrophic lake
- is rich in nutrients
- is poor in organic matter
- has high algal blooms
- is rich in dissolved oxygen
- has no issue with the survival of fish and other aquatic life
A1, 2 & 3 only
B3, 4 & 5 only
C1 & 3 only ✓ Correct
D2 & 4 only
Correct answer: (C) 1 & 3 only — The answer is 1 and 3.
Explanation
★The answer is 1 and 3.
★An eutrophic lake is rich in nutrients such as nitrogen and phosphorus, which is item 1.
★This over enrichment causes high algal blooms, which is item 3.
★The blooms and their decay consume oxygen, so the water is poor in dissolved oxygen.
★So it is not rich in organic matter loss terms as item 2 states, and not oxygen rich as item 4 states.
★Low oxygen threatens fish and aquatic life, so item 5 is wrong.
★So the answer is 1 and 3.
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