Download presentation
Presentation is loading. Please wait.
Published byJonah Gardner Modified over 9 years ago
1
The Evolution of Evolution
2
Consider… 10:30 pm on December 31: the first human-like animals emerge Modern-looking humans have only been around for 100,000 years
3
Evolution Pre-Darwin Plato and Aristotle Carolus Linnaeus (1717-1778)
4
Jean-Baptiste Lamarck (1744-1829) Continual adjustment Ideas were flawed
5
Lamarck vs. Darwin
6
Georges Cuvier (1769- 1832) Catastrophism i.e., Noah ’ s flood
7
Sir Charles Lyell (1797-1875) Geological change was slow and continual, not due to catastrophes uniformitarianism Corresponded with Darwin
8
Alfred Russel Wallace (1823-1913) Reached similar conclusions as Darwin
9
Charles Darwin (1809-1882)
10
The Voyage of the HMS Beagle 1831-1836 Galapagos Islands
11
The Principles of Natural Selection According to Darwin 1. Variation The essential underlying feature of evolution Random mutations create a variety of individuals, some of whom are better suited to the environment
12
The Principles of Natural Selection According to Darwin 2. Heritability Offspring inherit characteristics from their parents
13
The Principles of Natural Selection According to Darwin 3. Differential Reproductive Success “Natural Selection” Those who inherit favorable characteristics will thrive Those who do not will die out
14
British Moths and Kettlewell ’ s Experiment
15
Directional vs. Normalizing Selection Directional: adaptation toward an adaptive change i.e., the peppered moth Normalizing: adaptation against extremes i.e., birth weight
16
Evolution After Darwin “Punctuated Equilibrium” Stephen Jay Gould The mapping of the human genome has changed everything Genetic mutation is not the only element of change “ Switch ” Genes
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.