Chapter 22

Chapter 22 - Chapter 22-Descent with Modification: A...

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Chapter 22--Descent with Modification: A Darwinian View of Life
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Darwin-View of life 1859-Origin of species is published Most note that as the day to remember, but the study of evolution began much earlier Evolution-the idea the life changes, species that exist today are different from those that existed in the past
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Greek Philosophy Enormous amount of influence of Western thought Beginnings of evolutionary view of life Anaximander-pre Socratic Greek philosopher Thought that life had gradually changed from sea dwelling to land dwelling organisms Not natural selection per se, but an early evolutionary view One of the first true scientists-looked for natural explanation to natural phenomenona
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More Greeks About 300 years later along comes Aristotle You might have heard of him Held the idea that species were fixed and unchanging Could be arranged by affinities into the Scala Naturae -the nature ladder First form of taxonomy
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Other influences on Darwin and pre Darwinian thinking Linnaeus-1707-1778 First to classify living things into groups Used the nested classification system which still is basis for our scheme today Grouped organisms into groups based on their similarity Developed the binomen -two name system Homo sapiens
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Other influences on Darwin and pre Darwinian thinking Geologists Hutton-Laid groundwork for what we call today Gradualism In a geologic sense, geologic changes take place gradually over periods of millions of years Lyell Contemporary of Darwin
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Chapter 22 - Chapter 22-Descent with Modification: A...

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