Question of the Day

1. Question of the Day Question: Why might using only morphology be unreliable when making a phylogenetic tree? Answer: … … … • 1’s Turn In: • Caminalcule Analysis • p. 473 A.Q. 2ab, 3ab

2. Notes: Evidence for Evolution(Part 2)

3. Types • 4 key areas of evidence: • Fossils • Morphology • Embryology • Biochemical

4. Guess The Embryo: A B C D

5. 9 Days 8 Days 11 Days 10 Days 13 Days 15 Days 12 Days 14 Days House Mouse 16 Days 17 Days 18 Days C

6. Guess The Embryo: A B C D

7. 6 Days 5 Days 7 Days C Japanese Quail 10 Days 8 Days 9 Days

8. Guess The Embryo: A B C D

9. 18 Days 19 Days 17 Days 21 Days 20 Days B Red-Eared Slider Turtle

10. Guess The Embryo: A B C D

11. 40 Days 46 Days 44 Days 50 Days 54 Days 60 Days 65 Days 70 Days 80 Days 90 Days D Short-Tailed Fruit Bat

12. Comparative Embryology • Studying the development of related organisms • Compare similarities in embryos

13. Comparative Embryology • Shows common ancestry of many animals • Features are not yet specialized • Homologous features: came from same ancestral source

14. Biochemical Evidence • Comparing DNA sequences of organisms • More DNA shared = more closely related • More differences means more time since species diverged • Also compare RNA, enzymes, proteins, lipids human... GTGCCAGCAGCCGCGGTAATTCCAGCTCCAAT... yeast ... GTGCCAGCAGCCGCGGTAATTCCAGCTCCAAT... corn... GTGCCAGCAGCCGCGGTAATTCCAGCTCCAAT... There are over 3 billion bases in the human genome!

15. Biochemical Evidence • Useful for creating phylogenetic trees • More accurate than morphology

16. Biochemical Evidence for Evolution

17. Video: Dogs Decoded