Charles Darwin’s studies on natural selection showed how living organisms are unique but share similarities as well. His observations on the Galapagos finches were a prime example of unity and diversity of life. He concluded that the several species of finches derived from one common ancestor. Over time, the ancestral finches migrated to the other islands in the Galapagos and after many generations they gradually evolved differently to be able to adapt to their respective environments. He called this process of evolution, natural selection. As the finches evolved, their beaks changed to better gather the varies foods that were available on each of the islands. Natural selection resulted in random, abnormal genes appearing in the finches that
