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NS101After The Origin

NS101After The Origin - NS101(JSA After the Origin Problems...

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NS101 (JSA) After the Origin - Problems 01/10/2007 09:59:00 Review More Problems with Darwin’s Model  Scientific  o William Thompson, Lord Kelvin Age of the Earht (24 million years) Much younger than Dariwn’s hundreds of millions of years old o Transitional Fossils Fossil record incomplete  Fossilization is difficult, rare Lack of transitional fossils o Artificial Breeding Observation: reversion of selected types to the wild type  (breeded features return to natural features over time) How does that happen? What is the mechanism? Artificial selection – breeding for a certain feature Observation: maintenance of varieties in a population  o Mechanism of Inheritance  Little understanding of the process ofinheritance (mechanism,  how it actually works) Natural selection requires variation What is the “pool of variation”?
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