Darwin’s Finches

Part I of Essay
On the Galapagos Islands in the Pacific Ocean lives thirteen different species of finches. Although not much to look at, these thirteen different species, sporting thirteen distinctly different beaks, provide proof of Darwin’s theory of evolution by natural selection. But h ....

Part II of Essay
.... is the differences between the common giraffe (Giraffa camelopardalis), and the reticulated giraffe (Giraffa cameloparadalis reticula). These two subspecies have formed on different sides of the Tana River in Kenya. They are phenotypically distinct, and can only produce fertile offspring in zoos. Sympatric speciation occurs when two segments of the same species occupy a geographical area without interbreeding. Each new species, or subspecies, adapt to a specific environmental niche (adaptive radiation). Two segments of the same speci ....