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Darwin's Finches are an excellent examples of:
A
brood parasitism
B
connecting links
C
adaptive radiation
D
seasonal migration
Detailed Solution
During his voyage Darwin observed small black birds on the Galapagos Islands, later called Darwin's finches.
He found many varieties of finches on the same group of islands, and concluded that all of them had evolved on the islands themselves from one original seed-eating stock.
From the seed-eating features, many other forms with altered beaks arose, enabling them to become insectivorous and vegetarian finches.
This process of evolution of different species in a given geographical area, starting from a point and literally radiating to other areas of geography (habitats), is called adaptive radiation.
Another example is the Australian marsupials.
So Darwin's finches are an excellent example of adaptive radiation.
He found many varieties of finches on the same group of islands, and concluded that all of them had evolved on the islands themselves from one original seed-eating stock.
From the seed-eating features, many other forms with altered beaks arose, enabling them to become insectivorous and vegetarian finches.
This process of evolution of different species in a given geographical area, starting from a point and literally radiating to other areas of geography (habitats), is called adaptive radiation.
Another example is the Australian marsupials.
So Darwin's finches are an excellent example of adaptive radiation.