Introduction to Evolution

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Introduction To Evolution

What is Evolution? Evolution is the process by which all living things have developed from primitive organisms through changes occurring over billions of years, a process that includes all animals and plants. Exactly how evolution occurs is still a matter of debate, but there are many different theories and that it occurs is a scientific fact. Biologists agree that all living things come through a long history of changes shaped by physical and chemical processes that are still taking place. It is possible that all organisms can be traced back to the origin of Life from one celled organims.

The most direct proof of evolution is the science of Paleontology, or the study of life in the past through
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He presented his discovery along with another English naturalist, Alfred Russel Wallace, who independently discovered natural selection at about the same time. The following year Darwin published his full theory, supported with enormous evidence, in On the Origin of Species.


The contribution of genetics to the understanding of evolution has been the explanation of the inheritance in individuals of the same species.
Gregor Mendel discovered the basic principles of inheritance in 1865, but his work was unknown to Darwin. Mendel's work was "rediscovered" by other scientists around 1900. From that time to 1925 the science of genetics developed rapidly, and many of Darwin's ideas about the inheritance of variations were found to be incorrect. Only since 1925 has natural selection again been recognized as essential in evolution. The modern theory of evolution combines the findings of modern genetics with the basic framework supplied by Darwin and Wallace, creating the basic principle of Population Genetics. Modern population genetics was developed largely during the 1930s and '40s by the mathematicians J. B. S.
Haldane and R. A. Fisher and by the biologists Theodosius Dobzhansky , Julian
Huxley, Ernst Mayr, George Gaylord SIMPSON, Sewall Wright, Berhard Rensch, and G.
Ledyard Stebbins. According to the theory, variability among
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