History of Evolution

History of Evolution - History of Evolution Prior to 1800's...

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History of Evolution Prior to 1800’s most thought o All species created at once and unchanged (Immutability of Species) o Spontaneous generation Life comes out of nowhere Disproved by Pasteur’s experiment Refuting Evidence: o Fossils o Older earth o Pasteur’s work Lamarck’s Evolution o Species evolve Species change over time by breeding o Inheritance of acquired characteristics (use/disuse) Organisms changed by what they did in their lifetime o Toward perfection Darwin – Wallace Ideas o Over-production of offspring Most organisms produce more offspring than what will survive o Genetic Variability Mutation Meiosis and fertilization Crossing over o In the presence of selection Change from generation to generation (Adaptation) o Can’t explain adaptation without talking about variable and the screen of the environment Adaptation o Any heritable structure, process, function or behavior which enhances reproductive success (more offspring into the next generation) Evolution: Change in allele frequency (popn) over time. o
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History of Evolution - History of Evolution Prior to 1800's...

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