Geography And The Evolution Of Species

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Does the geography of the world affect the way in which species evolve? Geography and the evolution of species have been closely linked for hundreds of years. Continental drift was the first major event that had a direct effect on the evolution of species. Continental drift affected the evolution of animals through isolated speciation. The theory of continental drift states that there was one big supercontinent 200 million years ago. This continent was called Pangaea. Pangaea then started to break up into two separate continents. The two continents name was Laurasia and Gondwanaland. These two continents were during the Jurassic period (150 million years ago). These two continents then further broke up to form our continents today. This happened at the end of the Cretaceous period (65 million years ago). Figure 1.1 showing continental drift. In 1915 Alfred Wegener who was a German geologist discovered identical fossils of plants and animals on different sides of the Atlantic. This led Wegener to believe that the continents were once connected. After Wegener’s findings scientists showed that plate tectonics caused continental drift which led to evolution of species. Figure 1.2 showing fossil remains found by Alfred Wegener Biogeographers were now able to identify that when the continents have a collision species are able to mix and then when the continents then separate they take their species with them. For example Africa, South America, Australia and New Zealand were part of Gondwanaland. Plate tectonics caused the continents to split. A group of species called midges(small insects) show the same pattern. Another example to show that geography effects the evolution of species is the example of the Glossopteris.... ... middle of paper ... ...not a hypothesis. A hypothesis is a testable statement whereas a theory is a general explanation of a natural phenomenon with consistent evidence gained through repeated evidence and from doing many experiments. Evolution is a theory because of all the evidence found through fossils, molecular biology, embryology, physiology, biogeography, homologies etc. Evolution has been thoroughly tested. My personal opinion is that evolution does exist. I believe that species are constantly evolving into new species and that the geography of the world affects the evolution of species. I do believe that science and faith are in harmony with one another. There is a lot of evidence to support the theory of evolution and that geography has an effect on the evolution of species. Many scientists have proved that evolution does occur and that species do change over a period of time

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