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Darwin's On The Origins Of Species

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Darwin is a scientist who was traveling around the world starting at England. While he was traveling around the world he was observing species which led him to the hypothesis about the way life changes over time. As he got back from traveling around the world he began to wonder if the animals living on the different islands were part of the same species.In 1859 Darwin wanted to publish his thoughts, so he created the book, “On the Origins of Species” this book showed how evolution has been going on for millions of years. One of Darwin's most important facts is that animals, plants, etc of each species vary from each other. Darwin wants everyone to know that variation is important because back in Darwin's days this was not important at all. …show more content…

This is called struggle of existence. The predators that are faster,stronger,and smarter can catch prey, but some prey could be smarter,faster, and stronger as well meaning they won't get caught. The main key to struggle for existence is fitness which is when an an organism adapts to his environment meaning producing offsprings and surviving in the environment. Animals or plants etc all have adaptations which are traits that help there chance of survival to their environment. The organisms that can reproduce well, that have good adaptations, that fit to their environment is called survival of the fittest. Darwin called this natural selection. Over time natural selection changed traits of a population of species. This increased the species ability to adapt to the environment. Over a long period of time natural selection produced different traits or characteristics for organisms. Even though species are different from their past descents. But each living organism has descended from their past ancestors over a long period of time this is known as descent with modification. As you look back as far as you want you will notice that species now are related to their ancestors. For example the tiger would be related to the saber tooth tiger, all living species have common ancestor. This is known as a common descent. This makes all organisms come together in a single tree of

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