BIOL 1020H Lecture Notes - Lecture 5: Ecology, Biodiversity Hotspot, Mate Choice

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17 Dec 2015
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Huttons and lyells proposed that events in the past already happening today and is gradually changing. This influenced charles darwin to think that the earth must be really old for evolution must occur as he points about the slow changes documented in fossil record. Hutton and lyell proposed that events in the past were caused by the same processes operating today. This principle suggested that earth must be much older than a few thousand years, the age that was widely accepted at that time. Hutton and lyell also thought that geologic change occurs gradually, stimulating darwin to reason that the slow accumulation of small changes could ultimately produce the profound changes documented in the fossil record. In this context, the age of earth was important to darwin, because unless earth was very old, he could not envision how there would have been enough time for evolution to occur. The similarities are very few in that birds have feathers.

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