Can some one please describe how the finches of Galapagos Islands are an example of divergent evolution????

Finches are an example of divergent evoultion because based on the food available on each island, a single species of finches gradually over time evolved to be distinctly different speices based mainly on the shape of their beaks (variations within a population results in the differences in beak sizes and shapes). Beaks most suited for finding/eating the food available on the island becomes favourable and that kind of beak becomes a dominant trait as the other finches with less advantageous beaks die from starvation. Eg: in an island with alot of worms located deeper underground, the finches with longer beaks can reach the worms and thus survive. Finches with shorter beaks cant reach the worms and soon die out (because they starve to death) due to natural selection.  more