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UPSC Prelims 2023 · Environment · Species Watch
Consider the following statements: Which one of the following is correct in respect of the above statements?
- Statement-I: Marsupials are not naturally found in India.
- Statement-II: Marsupials can thrive only in montane grasslands with no predators.
- (a) Both Statement-I and Statement-II are correct and Statement II is the correct explanation for Statement-I
- (b) Both Statement-I and Statement-II are correct and Statement II is not the correct explanation for Statement-I
- (c) Statement-I is correct, but Statement II is incorrect
- (d) Statement-I is incorrect, but Statement-II is correct
Show the answer and explanation
Answer: (c) Statement-I is correct, but Statement II is incorrect
Marsupials are not native to India; their absence is about history, not habitat.
Statement by statement
1. ✓ CORRECT Marsupials live naturally in Australia and New Guinea, and the opossums of the Americas — not in India.
2. ✗ WRONG Marsupials live in deserts, forests and grasslands, alongside predators. Their range comes from continental drift history, not habitat.
The idea
Where marsupials live is explained by the history of the continents, not by a kind of habitat. Australia broke away and stayed isolated for tens of millions of years. Its marsupials evolved there without competition from the placental mammals that took over other continents.
Southern landmass (Gondwana) breaks up → India drifts north and joins Asia → Australia drifts away alone → Marsupials spread into every habitat there: desert, forest, grassland → None reach India
The trap
Statement II sounds like a scientific reason. It is invented — kangaroos live in hot dry plains with dingoes.
Elimination technique
Statement II says marsupials can thrive “only in…” one kind of place. Absolute words usually mark the false statement in Environment PYQs. With II false, only option (c) fits.
Also know
Kangaroos live on hot dry plains alongside the dingo; tree kangaroos live in rainforest. The Americas have their own marsupials, the opossums.
🔒 Marsupials: Australia–New Guinea + American opossums. Absent from mainland Asia because of plate history.