Darwin’s Theory of Evolution

Darwin’s theory of evolution revolves around four main points. The first one is that the present organisms,although resembling their ancestors, are not the same. Their DNA and physical features are different from their ancient ancestors. This proves that the world is not the same as it was billions and billions of years ago; it’s constantly changing. Darwin states that fossils are proof that organisms are constantly changing with the world. This brings up the second point, the branching of organisms. Certain organisms possess the same physical features because they share common ancestors but on the other hand, organisms who live in the same geographical area also possess similar features because of the environment. The third point is that evolution is a slow and tedious process that takes time;fossil records support the fact that evolution is gradual. The fourth point that Darwin makes is natural selection. This states that organisms with an advantageous trait survive and continue to have offspring.

“Darwin’s Theory.” Evolution and Natural Selection. 07052009. University of Michigan,  Web. 29 Oct 2009. <http://www.globalchange.umich.edu/globalchange1/current/lectures/selection/selection.html>.