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6.Evolution
normal
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as
A
adaptive radiation
B
natural selection
C
migration
D
divergent evolution.
(AIPMT-2012)
Solution
(a) : Adaptive radiation (divergent evolution) is the evolution from one species of animals or plants of a number of different forms. As the original population increases in size it spreads out from its centre of origin to exploit new habitats and food sources. In time, this results in a number of populations each adapted to its particular habitat, eventually these populations will differ from each other sufficiently to become new species.
Standard 12
Biology