Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (12.07.2022) Shift-I
Which of the following statements about biodiversity are correct?
- 1. Biodiversity can support ecosystem stability
- 2. Human activities have sharply increased species extinctions
- 3. Habitat fragmentation has no adverse impact on biodiversity
- 4. About 70 percent of all known species are invertebrates
A1, 2 and 3 only
B1, 2 and 4 only ✓ Correct
C2, 3 and 4 only
D1, 3 and 4 only
Correct answer: (B) 1, 2 and 4 only — The answer is 1, 2 and 4.
Explanation
★The answer is 1, 2 and 4.
★Biodiversity supports the stability of ecosystems, which is item 1.
★Human activities have sharply increased species extinctions, which is item 2.
★About 70 percent of all known species are invertebrates, which is item 4.
★Habitat fragmentation does harm biodiversity, so the claim that it has no adverse impact is wrong and item 3 is excluded.
★So the correct statements are the first, second and fourth.
★So the answer is 1, 2 and 4.
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