Marsupials are abundant in Australia but rare elsewhere. The biogeographical explanation is
- A
Recent human introduction seeded marsupial populations across Australia from northern hemisphere ancestors
- B
Marsupials independently evolved on every continent and only persisted in Australia by chance survival
- Ccheck_circle
Australia separated from other continents early; marsupials radiated there in isolation while placentals dominated other continents
- D
Convergent evolution produced marsupial-like body plans from placental ancestors isolated on the continent
Explanation
Plate tectonics explains why isolated continents have unique fauna — Australia's fauna evolved separately for millions of years.