Refers to the change from one condition to another one. In this manner, the book gradually, sequentially through a long period of time. The evolution of living organisms is thus meant to change gradually from primitive organisms to become proud of living things in the present. That differs from the native organism as a result of genetics and environment. Components of the genetics of populations occur in succession. By this change may occur only some or all of them as a result of the reaction with organisms adapted to suit the environment. When this process occurs, then it will not go back there again to another.
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