๐Ÿ“˜ Q.2 IAS Prelims 2023 โ€” Environment & Ecology (Marsupials)๐Ÿงท Authentic Classroom Explanation by IAS Monk


๐Ÿ“Œ The Question

Consider the following statements:

Statement I: Marsupials are not naturally found in India.
Statement II: Marsupials can thrive only in montane grasslands with no predators.

Which one of the following is correct in respect of the above statements?

(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


โœ… Correct Answer: (c)

Statement I is correct but Statement II is incorrect


๐Ÿง‘โ€๐Ÿซ Classroom Explanation

  • Statement I โ€“ Correct โœ…
    Marsupials are not naturally found in India. Their natural distribution is overwhelmingly concentrated in Australia, New Guinea, Tasmania, and nearby islands. Outside this region, only a few species (like the opossum) occur naturally in the Americas.
  • Statement II โ€“ Incorrect โŒ
    Marsupials are not restricted to montane grasslands, nor do they require predator-free environments.
    In fact, marsupials occupy diverse habitats:
    • Deserts (kangaroos)
    • Forests (koalas)
    • Grasslands
    • Urban edges
      They have coexisted with predators for millions of years.

Hence, Statement II does not explain Statement I.


โšก Curiosity Raiser

Why are marsupials mostly confined to Australia?
๐Ÿ‘‰ Because continental drift and evolutionary isolation protected them from placental mammal competition.


๐Ÿ“š Enrich Notes (UPSC Value-Add)

  • Marsupials vs Placental Mammals
    • Short gestation, long pouch development
    • Absence of corpus callosum
  • Biogeography Insight
    • Australia split early from Gondwana
    • Placental mammals dominated Asia & Africa later
  • UPSC Trend
    • Questions often mix evolution + geography + ecology

๐Ÿ•Š๏ธ IAS Monk Whisper

โ€œWhere continents drifted apart, evolution chose different scripts.โ€

Leave a Reply

Your email address will not be published. Required fields are marked *