lecture14F06

lecture14F06 - Lecture 14: Darwin and evolution The...

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Unformatted text preview: Lecture 14: Darwin and evolution The evolution controversy Darwin and his voyage of discovery. Darwin; FitzRoy; the Beagle; around the world; Galapagos archipelago; adaptation The Origin of Species and Darwins arguments for natural selection . 1859; Wallace Darwin as a scientist other work; coral reefs Main Ideas in the Origin descent with modification and natural selection; phylogenetic trees, fossil, fossil record, heritable variation; overproduction of offspring; environmental selection, use and disuse of characters, acquired characters. lack of inheritance of acquired character, artificial selection, cultivation; cultivated varieties Aspects of biology explained by Darwinian evolution . adaptation in real time (observable in human lifetime or recorded human history); homology (anatomical, embryological, molecular); biogeography and convergent evolution Assigned Readings: Ch. 22 Which is the real Darwin? The evolution controversy Charles Darwin: failed medical student, failed divinity student, ardent beetle collector. Parts of the following slides are condensed in Fig. 22.5 Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Voyage of H.M.S. Beagle, 1831 - 1836 90 feet of ship, 74 people living together for 5 years... Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Sir Robert FitzRoy: Commander of the Beagle at age 26 (the youngest captain ever in the history of Her Majesties Navy). Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Brazil: thrilled by rainforest, appalled by slavery Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Galapagos archipelago: volcanic islands less than 15 MY of age. Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation High lush island Low, desert island Darwin Darwin the Beagle FitzRoy the world Galapagos adaptation Basis of natural selection: three generalizations about the properties of organisms individual members of any species vary somewhat from one another this individual variation is heritable...
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lecture14F06 - Lecture 14: Darwin and evolution The...

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