1. Office hours aplenty...

2. Fitness measured over many generations

3. Evolution does not always occur at the same rate.
Fig 25.14
Evolution does not always occur at the same rate.

4. Why are intermediate traits sometimes hard to find?
Fig 24.17
Why are intermediate traits sometimes hard to find?

5. What drives evolution?
What changes selection criteria?

6. The rate of evolution depends on the rate of environmental change.
Fig 25.14
The rate of evolution depends on the rate of environmental change.

7. We do not know what caused the largest extinction event known.
Fig
25.14

8. Fig 25.14
Dinosaur extinction

9. Fig 25.15
an Asteroid impact, 65 mya

10. Fig 25.7
History of Earth

11. Life as we know it…
Fig 26.21

12. Molecular similarities show relationships that are not obvious by morphology
Fig 26.2

13. Convergent Evolution means that morphology is a poor predictor of evolutionary relationships
Fig 26.7

14. Phylogeny and its connection to evolution
Fig 26.4

15. phylogenetic hierarchy
Fig 26.3
phylogenetic hierarchy

16. an evolutionary tree: comparing gene sequences
Fig 26.13

17. Phylogenies as multiple hypotheses
Percent difference between sequence
Fig 26.14

18. Phylogenies as multiple hypotheses:
Fig 26.15
Phylogenies as multiple hypotheses:
parsimony

19. Phylogenies as multiple hypotheses:
Fig 26.15
Phylogenies as multiple hypotheses:
parsimony
(more tree making practice in discussion)

20. Life as we know it…
Fig 26.21

21. Fig 34.37
DNA is passed from generation to generation, and therefore can tell us about relationships between species.

22. The earth is covered in humans. How did this occur?

23. Only the egg provides mitochondria to the offspring.
Fig 47.3
mitochondria

24. Mitochondrial DNA comparisons can be used to trace ancestry:

25. mtDNA helped determine what happened to Anastasia

26. Non-Coding DNA is used for comparisons between individuals

27. Only DNA that is successfully passed on can be used to trace the past.
Fig 1

28. Next: Are we
genetically
programed
to be racist?
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