Evolution of Species

682 Words Jan 25th, 2018 3 Pages
In the words of Charles Darwin, “It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change”. From all the ends of the Earth, there is a wide spectrum of beings from all the six kingdoms of all living things (Plantae, Animalia, Fungi, Protista, Eubacteria, Archaebacteria) that are the product of millions of years of evolution – “the greatest show on earth” (David Attenborough). The icon of the Arctic, the polar bear is a tribute to the theories of evolution by natural selection that have been created by many scientists, specifically; Charles Darwin, Jean-Baptiste Lamarck, Alfred Russel Wallace, Ernst Haekel and Theodosius Dobzhansky.
This report will elaborate on the evolution of the polar bear or Ursus Maritimus over hundreds of thousands of years.

The analysis of the DNA of a distinct population of brown bears inhabiting Alaska’s ABC Islands (Admiralty, Baranof and Chichagof) approximately 1,450km south of the nearby polar bear habitat, revealed that the ABC bears were even more closely linked to polar bears genetically than they were to other brown bears. Polar bears are believed to have diverged from a population of brown bears that became isolated during a period of glaciation in the Pleistocene. (DeMaster, Douglas P.; Stirling, Ian (8 May 1981). "Ursus Maritimus". Mammalian Species 145 (145):…
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