10 For Darwin’s theory of evolution by natural selection to work, Earth would have to be very old and change slowly over time.Hutton and Lyell proposed that geological forces shaped the Earth over Millions of years.
11 The Origin of SpeciesDarwin publishes his theory 25 years after his voyage on the Beagle.
12 Evolution by Natural Selection 1. Every species produce more offspring than will survive to maturity.2. Natural variationDifferences among individuals3. Struggle for existenceCompete for food, shelter, etc4. Survival of the fittestFitness = The ability to Survive & reproduceAdaptation = anything that increase the chance an organism will survive
13 Evidence of Evolution 1. Homologous structures 2. Vestigial structures appendix“tail bone”muscles that move the ears3. Similarities in early development4. Similarities in macromolecules