Evolution and Lamarc2 - modern animals were modified forms...

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Evolution and Lamarck Species Change Over Time An important step toward the modern theory of evolution came in the 1760's, when Count George-Louis Leclerc de Buffon (1707-1788) published his Natural History of Animals. In this treatise, Buffon described the similarities he found in the limb bones of very different animals. For example, he noticed that dogs had bones in their legs similar to those found in flippers of seals, though the two structures were used in entirely different ways. He found that pigs had toes similar to those of other mammals, except that they did not touch the ground. These observations led him to propose that these animals had not been created as they then appeared, but rather that
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Unformatted text preview: modern animals were modified forms of a common ancestor. Buffon's idea that species change over time has become the cornerstone of the modern of evolutionary theory. His technique of comparing similar structures across different species, called comparative anatomy, is used today in the study of evolution and is discussed in evidence of evolution . Figure %: Comparison of mammalian limb bones While Buffon's observations led him to conclude that species did in fact change over time, he was unable to propose a mechanism by which this change occurred. This question would have to wait for a student of Buffon, Jean-Baptiste Lamarck, whose answer is discussed in the next section....
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