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(B) Adaptive radiation is the process of evolution of different species in a given geographical area starting from a point and literally radiating to

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Pre-existing variations

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(B) Adaptive radiation is the process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography (habitats).Pre-existing variations within a population are the most important pre-condition for adaptive radiation.These variations allow individuals to adapt to different ecological niches or habitats,leading to the divergence of species from a common ancestor.

What is the most important pre-condition for adaptive radiation?

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