Which of these is not a classical example of adaptive radiation in the development of new species?

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The development of different functional structures from a common ancestral form is called adaptive radiation and its examples are:
1. Darwin's finches on the Galapagos islands.
2. Australian Marsupials.
3. Limbs of mammals.

Human evolution is not an example of adaptive radiation; it represents an example of anagenesis. Adaptive radiation is an evolutionary process that produces multiple new species from a single, rapidly diversifying lineage.

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