2. Georges Louis Leclerc de Buffon
1707-1788
• Believed species
changed over time into
less ideal form
http://archive.defra.gov.uk/foodfarm/farmanimal/diseases/atoz/fmd/a
bout/clinical-signs/pics-pigs.htm
3. Carl Linnaeus and Erasmus Darwin
• Carl Linnaeus (17071778)
• Erasmus Darwin (17311802) – Darwin’s
Grandpa!
• Both proposed life
changed over time
• Erasmus suggested all
life arose from single
common ancestor
4. Jean Baptiste Pierre Antoine
de Monet, Chevalier de Lamarck
• 1774-1829
• First to offer
mechanism for
evolution of species
• Based on 2 principles:
– use and disuse
– inheritance of acquired
characteristics
http://www.sparknotes.com/biology/evolution/lamarck/section2.rhtm
l
5. Analysis of Lamarck’s theory
• Why is his theory flawed?
• Which aspects of his theory were correct?
6. Fossil Formation
• Fossils are preserved
ancient remains of dead
organisms
• Fossils form more often
in low oxygen
environment and to
hard-bodied organisms
7. Reading the Fossil Record
• Most fossils are unusual
and of unknown
organisms
• There are no fossils of
most living species
• Fossils are buried deep
within rock formations
• Fossils are found in
unexpected locations
http://www.copernicusproject.ucr.edu/ssi/HSB
iologyResources.htm
(Video on Fossils and Evolution)
http://www.nps.gov/parkoftheweek/photo450.htm
8. Georges Cuvier
(1769-1832)
• Fossils of simple organisms are found in all
levels
• More complex are found at shallower depths
• Fossils at shallower depths are more likely to
be similar to living organisms
• Proposed theory of catastrophism
- global catastrophies such as floods caused
widespread extinctions of species and that
newly created set of species replaced extinct
ones (species don’t change)
