1. Evidence of Evolution
Biogeography, Geology, and the Fossil Record

2. Biogeography
The study of where organisms live now and where they and
their ancestors lived in the past.

3. Families have characteristicsFamilies have characteristics
Both on the outside and the inside...
Canidae - Dog Family
You can tell apart the different families (even species) of
mammals by their skulls - how the bones are arranged and
shaped, and the types of teeth they have.

4. Patterns tell us storiesPatterns tell us stories
Camel FamilyCamel Family
Evolution &Evolution &
DistributionDistribution
50 million year old
camel ancestor
South Dakota

5. Patterns tell us storiesPatterns tell us stories
Camel FamilyCamel Family
Evolution &Evolution &
DistributionDistribution
50 million year old
camel ancestor
South Dakota

6. Closely Related but DifferentClosely Related but Different
One of the
most
common
salamanders
in Oregon -
Ensatina
eschscholtzii
Hangs-out in wet leaves, old logs,
wood piles, and eats bugs....

7. Ensatina eschscholtzii
The Oregon subspecies has the largest
range in red...

8. Closely Related but DifferentClosely Related but Different
Divergent Evolution
http://www.ensatina.net/FIL
ES/ensatina.htm
Note how the map
of the species
distribution (a) and
genetic divergence
(b) directly relates
to the map of the
different
ecosystems in
California (c).
This is EVIDENCE
of biogeography!

9. Distantly Related but SimilarDistantly Related but Similar
Convergent Evolution

10. Distantly Related but SimilarDistantly Related but Similar
What Darwin called “Species vary globally.”

11. Distantly Related but SimilarDistantly Related but Similar
Pangolin
Asia
Giant Anteater
South America

12. Distantly Related but SimilarDistantly Related but Similar

13. How old is old?How old is old?

14. Radioactive DatingRadioactive Dating
Earth is 4.5 billionEarth is 4.5 billion oror
4,500,000,000 years old.4,500,000,000 years old.

15. That’s plenty of time for...That’s plenty of time for...

16. FossilFossil
EvidenceEvidence
EvidenceEvidence

17. Really now...Really now...