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Evolution
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Evolution

Evolution

Diversity of Life

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Nothing in biology makes sense EXCEPT in the light of evolution. Theodosius Dobzhansky

Nothing in biology makes sense EXCEPT in the light of evolution. Theodosius Dobzhansky

Evolution

Charles Darwin in later years

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History of Evolutionary Thought

History of Evolutionary Thought

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Early Ideas On Earths Organisms

Early Ideas On Earths Organisms

Aristotle believed species were fixed creations arranged by their complexity

Idea lasted 2000 years

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Early Ideas On Earths Organisms

Early Ideas On Earths Organisms

Linnaeus 1st to group similar organisms and assign them Latin names

Two word name (Genus species)

Known as Binomial nomenclature

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Contributors to Darwins thinking included:

Charles Lyell uniformintarianism (geologic processes still changing Earth)

Georges Cuvier species extinction (Catastrophism)

Thomas Malthus struggle for existence (resources)

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Contributors to Darwins thinking included:

James Hutton - Gradualism

John Baptiste Lamarck Inheritance of acquired Characteristics and Law of Use and Disuse

Alfred Russel Wallace organisms evolved from common ancestors

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Evolutionary Timeline

Evolutionary Timeline

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Catastrophism

Catastrophism

Idea proposed by George Cuvier

Studied fossil in sedimentary rock strata of Paris

Found some species completely disappeared in more recent layers

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Catastrophism

Catastrophism

Stated that species disappear due to a catastrophic event of the earths crust (volcano, earthquake)

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Huttons Theory of Geological Change

Huttons Theory of Geological Change

James Hutton, 1795, Scottish geologist

Studied invertebrate fossils in Paris Museum

Described The Geological Forces That Have Changed Life on Earth Over Millions of Years (erosion, earthquakes, volcanoes)

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Huttons Theory of Geological Change

Huttons Theory of Geological Change

Changes in Earths crust due to slow continuous processes

Idea Known as Gradualism

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