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Unformatted text preview: e solar system are 4.6 billion years
The oldest fossil organisms on Earth (bacteria) are 3.5
billion years old.
billion There is plenty of time for evolution Transitional Species
“..why, if species have descended from other
species by insensibly fine gradations, do we
not everywhere see innumerable transitional
Charles Darwin, 1859
Charles Darwin’s Answer:
There are imperfections in the fossil
record List as many as you can
3. Why do imperfections exist in the
fossil Most organisms don’t fossilize well Tissues differ in their likely hood to fossilize
Environments differ in their likely hood to produce
fossils Fossils are hard to find
Fossils are destroyed by erosion & disturbances
Many fossils are inaccessible Under ice, snow, sea & earth
Fossils on surface aren’t ancient
May be in politically sensitive areas To critics who demanded to see all of the intermediate steps
before they would believe in evolution,
“Opponents will say, show me them.
I will answer yes, if you will show me...
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- Fall '07