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Biol 202
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Origins of single-celled organism
Kingdom Protista-single celled eukaryote
1.8-1.9 bya
Mulitcellular (metazoans) origins
544 to 580 mya (Ediacara fauna)
What is Cambrian Explosion
Cambrian period when all extant vertebrate Phyla began
Paleozoic period
What is the Burgess Shale
in Yoho National Park, BC
Walcott 1909 discovered origin of fossils
due to escarpment slide and hydrothermal vents
well preserved soft-bodied fossils
What are the 3 classification schemes
Evolutionary History
Body Architecture
Habitats and lifestyles
3 Types of Evolution
Microevolution
Speciation
Macroevolution
Microevolution
form of natural selection
over a short time period
Speciation
due to reproductive isolation
over a long time
Macroevolution
due to phylogenetic patterns
geological time period
3 types of ancestry
monophyletic
paraphyletic
polyphyletic
Homologous characteristics
shared ancestry
Analgous
convergent characteristics
How does evolution progress?
Darwin
Random
Darwin
Survival of the fittest
Gradual process
predictable
Author
Anonymous
ID
65195
Card Set
Biol 202
Description
invertebrate zoology
Updated
2011-02-09T06:54:47Z
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