Theory of Evolution

Theory of Evolution - Theory of Evolution In his book The...

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Unformatted text preview: Theory of Evolution In his book The Origin of Species, Darwin presents evidence in a sober manner for his “descent by modification” theory, which has come down to us as the theory of evolution, although Darwin avoided the term “evolution.” Essentially, Darwin suggested that random variations take place in living things and that some external agent in the environment selects those individuals better able to survive. The method of selecting individuals is known as natural selection. The selected individuals pass on their traits to their offspring, and the population continues to evolve. Two essential points underlie natural selection. First, the genetic variations that take place in living things are random variations. Second, the genetic variations are small and cause little effect relative to a given population. Over time, these small genetic variations lead to the gradual development of a to a given population....
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