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| is the process by which modern organisms have descended from ancient organisms. (change over time). |
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| is a well supported testable explanation of phenomena that have occurred in the natural world. |
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| contributed more to our understanding of evolution than anyone. Born Feb 12, 1809 in England. |
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| Darwin made numerous observations and collected evidence that led him to purpose a revolutionary hypothesis about the way life changes over time. |
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| British Isles, around South America, to New Zealand, then Australia, tip of Africa back to South America and back up to the British Isles |
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- went ashore to collect plant and animal specimens
- at sea studied specimens
-read scientific books
- well educated
- strong interest in natural history
- curious & analytical in nature |
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Darwin was
- intrigued so many plants and animals seemed remarkably well suited to whatever environment they inhabited
- impressed by the many ways in which organisms survived and produced offsprings
- puzzled by where different species lived and did not live |
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| Living Organisms and Fossils |
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| Darwin realized animals represented just part of the puzzle. He collected the preserved remains of ancient organisms called fossils. |
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| Preserved remains of ancient organisms. |
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| These could be used to identify which island a particular tortoise inhabited. |
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| Some fossils resembled organisms that were still alive, others looked completely unlike any creature he had ever seen. |
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| These separate species would have evolved from an original South American ancestor species after becoming isolated from one another. |
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