CHARLES LYELL & JEAN-BAPTISTE LAMARCK
Summary of Ideas Proposed by these Chaps
Curvier’s Catastrophism Lyell’s UNIFORMITARIANISM
Lamarck’s
Inheritance of Acquired
Characteristics
Georges Cuvier
Georges Cuvier – developed paleontology
Georges Cuvier – developed paleontology
The study of life through ancient fossils
How can I explain how species go extinct in an area and how new ones repopulate the area?
How can I explain how species go extinct in an area and how new ones repopulate the area?
.. and that all this happened in 6000 years.
How can I explain how species go extinct in an area and how new ones repopulate the area?
… the idea that catastrophes such as floods, diseases, and droughts periodically destroyed species living in a particular region, allowing species from neighbouring regions to repopulate the area
Curvier’s Catastrophism
.. and that all this happened in 6000 years.
Charles Lyell says .. I don’t think that’s right
• Uniformitarianism:
Lyell’s theory that geological processes operated at the same rates in the past as they do today
• Uniformitarianism:
Lyell’s theory that geological processes operated at the same rates in the past as they do today
• Slow changes occurred in the past … Slow changes occur today too …
• Uniformitarianism:
Lyell’s theory that geological processes operated at the same rates in the past as they do today
• Slow changes occurred in the past … Slow changes occur today too …
• … and the Earth is probably older than 6000 years
Jean-Baptiste Lamarck• Hmm.. If changes happen slowly …
then animals would become progressively better adapted to their environments
Jean-Baptiste Lamarck• Hmm.. If changes happen slowly …
then animals would become progressively better adapted to their environments
Jean-Baptiste Lamarck• Hmm.. If changes happen slowly …
then animals would become progressively better adapted to their environments
Jean-Baptiste Lamarck• Hmm.. If changes happen slowly …
then animals would become progressively better adapted to their environments
• Proposed the following.
Inheritance of acquired characteristics
- the idea that characteristics acquired during an organism’s lifetime can be passed on to its offspring
Lamarck suggested that body parts not used would eventually disappear. This idea is called use and disuse.
Summary of Ideas Proposed by these Chaps
Curvier’s Catastrophism Lyell’s UNIFORMITARIANISM
Lamarck’s
Inheritance of Acquired
Characteristics
Charles Darwin Enters the Scene …• Okay I agree with the idea
that there are slow changes .. And these slow changes occur in populations
The rest of you are wrong.
Welcome
Darwin’s Theory of Evolution by Natural Selection
• Q# 3-6, Page 327
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