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Evolution of Feathers
Transcript
Evolution of Feathers
Evidence
Fossils
How Feathers Evolved
Homologous Structures
How Evolved
Penguin Feathers
Parrot Feathers
Advantages
Owl Feathers
Sexual Selection
Sources:
http://people.eku.edu/ritchisong/feather_evolution.htm
https://askabiologist.asu.edu/content/23-functions-feathers
Timeline
Beipiaosaurus
Early Cretaceous
(127 - 121 million years ago)
Environment
Evolution due to Selective Pressures.
short, hydrodynamic hair.
Habitat
birds need long feathers on their wings.
Russia and Canada
Africa
Australia
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