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Occurrence of endemic species in South America and Australia is due to : -
A
These species have become extinct from other regions
B
Continental separation
C
There is no terrestrial route to these places
D
Retrogressive evolution
Detailed Solution
Endemic species are found only in a particular region.
South America and Australia separated from the other continents long ago (break-up of Gondwanaland). Their animals and plants were isolated and evolved independently.
For example, Australian marsupials radiated into many forms by adaptive radiation, without competition from placental mammals.
So the endemic species of South America and Australia are due to continental separation.
South America and Australia separated from the other continents long ago (break-up of Gondwanaland). Their animals and plants were isolated and evolved independently.
For example, Australian marsupials radiated into many forms by adaptive radiation, without competition from placental mammals.
So the endemic species of South America and Australia are due to continental separation.