Study the figure and answer the following

(a)Write your observations on the variations seen in the Darwin's finches shown above .
(b)How did Darwin explain the existance of different varietie of finches on Galapagos Islands ?

Explanation

(a) These were small birds observed in Galapagos Islands. There were many varieties in same island and showed differences amongst themselves in shape and size of beaks depending upon their food habits (b) Darwin reasoned that after originating from a common ancestral seed eating stock, the finches must have radiated to different geographical areas and undergone adaptive changes, especially in the type of beak (adaptive radiation) Living in isolation for long. the new kinds of finches emerged that could function and survive in the new habitats.