Puzzle of life’s diversity Evolutionary theory Change over time Well-supported, testable explanation of phenomena.

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Presentation transcript:

Puzzle of life’s diversity Evolutionary theory Change over time Well-supported, testable explanation of phenomena

Voyage of the beagle Charles Darwin 1831 HMS Beagle Theory of Evolution

Darwin’s Observations Fossils Galapagos Islands Land Tortoises and Iguanas

An Ancient, Changing Earth Hutton and lyell Many millions Rain, heat, and cold temperatures

Hutton’s theory of geological change Hutton

Lyell’s Principles of Geology Life could change

Lamarck’s Theory of Evolution Lamarck Use Disuse Perfection Decrease in size incorrect

Population Growth Thomas Malthus Not enough food or space

Darwin Presents his Case Had the scientific community abuzz

Publication of the origin of species Natural selection

Natural variation and artificial selection Natural variation Artificial selection

Evolution by natural selection More organisms are produced than can survive, so only the most adapted/fit survive and reproduce. The others die and do not.

The struggle for existence Compete Food, space, mates

Survival of the Fittest Fitness Adaptation Survival of the fittest Natural selection

Descent with modification Common descent ancestor

Evidence of evolution 1. fossil record 2. homologous structures 3. vestigial structures 4. embryological similarities 5. biochemistry DEFINE THESE TERMS ON YOUR MOVIE NOTES PAGE