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Evolution Introduction - Honors Biology
Transcript of Evolution Introduction - Honors Biology
1798: Thomas Malthus publishes "Essay on the Principle of Population"
1809: Jean-Baptiste Lamarck publishes his hypothesis of evolution
1809: Darwin (and Abe Lincoln) born
1812: Georges Cuvier publishes studies of vertebrate fossils
1830: Charles Lyell publishes "Principles of Geology"
1831-1836: Darwin travels the world on
1844: Darwin writes his essay on descent with modification
1858: While studying species in the Malay Archipelago, Alfred Wallace sends Darwin his hypothesis of natural selection
1859: "On the Origin of Species by Means of Natural Selection" is published
History of Evolutionary Thought
How Evolution Works
among individuals (observation)
for Limited Resources (inference)
of Offspring (Malthus)
5. Repeat every generation over millions of years (Lyell)..
4. Successful competitors survive, reproduce, & pass on their traits (observation)
No two are quite the same!
It's the "Struggle for Existence!"
Most Babies won't grow up!
Introduction to Evolution
1844 - 1859 ?
Darwin provided many examples of "
Just like natural selection, but "fitness" is determined by human needs/wants.
Big changes can happen very fast.
"Endless forms most beautiful"
Evidence for Evolution
Ancient ideas about evolution:
The Modern Synthesis
Genetics + Evolution
Evidence for evolution comes from five major sources
Homologous Structures = Divergent Evolution
Analogous Structures = Convergent Evolution
The fossil record is fairly complete, with many transitional forms or "missing links"
DNA sequence and protein sequnce similarity
...& life will
to the environment
But...it's "Just a Theory" right??
is a theory
Theories must be
Luc Viatour / www.Lucnix.be
Peppered moth in England
Two coloration variants: light and dark
Industrial Revolution = Pollution
Saying "Just a Theory" indicates a fundamental lack of understanding of science
Environment is cleaned up