The Wallace's Line distinguishes or separates the flora and fauna

The Wallace’s Line distinguishes or separates the flora and fauna between

[amp_mcq option1=”Canada and USA” option2=”Taiga region and Tundra region” option3=”Mexico and Central America” option4=”South-East Asia and Australasia” correct=”option4″]

This question was previously asked in

UPSC CAPF – 2013

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The correct answer is D. Wallace’s Line is a faunal boundary line that separates the ecozones of Asia and Wallacea, a transitional zone between Asia and Australia. It effectively distinguishes or separates the flora and fauna between South-East Asia and Australasia.

– Wallace’s Line was proposed by Alfred Russel Wallace based on his observations of dramatic differences in animal distribution across the Malay Archipelago.
– West of the line, species are largely of Asian origin (e.g., tigers, rhinos, monkeys).
– East of the line, species are largely of Australian origin (e.g., marsupials, cockatoos).
– The line runs through Indonesia, between Borneo and Sulawesi, and between Bali and Lombok.

Wallace’s Line is thought to reflect a deep ocean trench that acted as a barrier to migration even during lower sea levels in glacial periods. This prevented many species from crossing between the Asian and Australian continental shelves.

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