BIO120H1 Chapter Notes - Chapter 1: Ginkgo, Common Descent, Carl Linnaeus

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3 Oct 2016
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BIO120H1 Full Course Notes
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Bio120h1 f - why evolution is true - chapter 1. 18th century philosopher william paley described how animals seem almost perfectly designed to survive and function. Analogized to a watch - a watch found lost on the ground would be recognized as made by a watchmaker; similarly, the intricate functioning of animals and their interactions with other animals implies a conscious designer (i. e. god): Darwin"s on the origin of species proved that these observations were due to evolution and natural selection. Theory of evolution: all life evolved from one primitive species which lived more than 3. 5 billion years ago; gradually branched into different species, by the mechanism natural selection". Six key components: evolution, gradualism, speciation, common ancestry, natural selection, nonselective mechanisms of evolutionary change: evolution: species undergo genetic changes over time due to dna mutations; not identical to ancestors, but are descendants.

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