2012 · Q20
Which of the following can be threats to the biodiversity of a geographical area ?
- 1Global warming
- 2Fragmentation of habitats
- 3Invasion of alien species
- 4Promotion of vegetarianism
General ScienceBiology
- A1, 2 and 3 only
- B1, 2 and 4 only
- C3 and 4 only
- D1, 2, 3 and 4
Explanation
Global warming shifts climatic zones and stresses species, habitat fragmentation isolates populations and blocks migration, and invasive alien species outcompete natives — all three are textbook threats to biodiversity. Promotion of vegetarianism reduces pressure on land and resources and is not a biodiversity threat. Hence only 1, 2 and 3.