Biological evolution provides the explanation for how populations and species change through time.
Although this is not a course in biology or evolution, certain tenets and principles of evolution are crucial to understanding life on Earth and the discipline of biogeography. It was the geographical destribution of species that spawned Darwin's notion of common descent. It is evolution that has produced the great variation of life. All life descended from some unknown prototype Publishes The Origin of the Species in 1859 after receiving manuscript from Wallace Work of Alfred Russell Wallace was equally perceptive. Natural selection-what is it and why is it important.