1. Evolution http://life.uiuc.edu/animalbiology/105/ ID: eee105 Password: prAIRie Lec 11 11Feb02

2. The Depth of Evolutionary Time Oldest fossils:~3.7 billion years ago microbial microfossils Making the history of life proportionate to one year, each day is 10 million years long

3. The Year of Life Earth’s origin was Oct 15 of the previous year Life begins, Jan 1, 12 midnight prokaryotes

4. The Year of Life Earth’s origin was Oct 15 of the previous year Life begins, Jan 1, 12 midnight prokaryotes

5. The Year of Life Life begins, Jan 1, 12 midnight prokaryotes When do our kind of species evolve? Atmosphere goes aerobic on June 19 2 billion years ago Photosynthetic prokaryotes did it

6. The Year of Life 1st EukaryotesAug 181.4 billion years ago 1st AnimalsOct 23700 million years ago Start fossil recordNov 2600 MYA 1st VertebratesNov 10 a jawless fish an ostracoderm

7. The Year of Life 1st amphibians 27 Nov

8. The Year of Life 1st amphibians27 Nov 1st reptiles4 Dec

9. The Year of Life 1st amphibians27 Nov 1st reptiles4 Dec Age of dinosaurs 8 Dec - 23 Dec 150 million years!

10. The Year of Life 1st amphibians27 Nov 1st reptiles4 Dec Age of dinosaurs 8 Dec - 23 Dec 150 million years! is a success story

11. The Year of Life the first mammalsDec 14 birdsDec 16

12. The Year of Life the first mammalsDec 14 birdsDec 16 flowering plantsDec 22

13. The Year of Life the first mammalsDec 14 birdsDec 16 flowering plantsDec 22 primatesDec 23

14. The Year of Life the first mammalsDec 14 birdsDec 16 flowering plantsDec 22 primatesDec 23

15. The Year of Life When humans? first hominidsDec 31~2 pm NeanderthalsDec 3111:45 pm

16. The Year of Life first hominidsDec 31~2 pm NeanderthalsDec 3111:45 pm Homo sapiensDec 3111:54 pm last ice ageDec 3111:58 pm Last 70 seconds Human history

17. Natural selection How evolve adaptations ?

18. Darwin on the Galapagos

19. Galapagos Islands

20. “transmutation” of species

21. (1) Individuals vary Natural selection genetic diversity, always results from sexual reproduction

22. biotic potential logistics curve N t K (2) Overproduction of progeny

25. biotic potential logistics curve N t K only a few survive (2) Overproduction of progeny lost

26. (3) Competition between individuals

27. (4) Fittest individuals survive and reproduce Thus, population becomes better adapted e.g. a population of bacteria N now add antibiotic 0%100% antibiotic resistance

28. (4) Fittest individuals survive and reproduce Thus, population becomes better adapted e.g. a population of bacteria N now add antibiotic 0%100% antibiotic resistance

29. (4) Fittest individuals survive and reproduce Thus, population becomes better adapted e.g. a population of bacteria N now add antibiotic 0%100% antibiotic resistance

30. (4) Fittest individuals survive and reproduce Thus, population becomes better adapted e.g. a population of bacteria N now add antibiotic and they reproduce population is antibiotic resistant 0%100% antibiotic resistance

31. a routine mutant hunt ….. agar + penicillin bacterial colonies on petri plate

32. a routine mutant hunt ….. agar + penicillin bacterial colonies on petri plate penicillin-resistant colony

33. Antibiotic resistance in disease bacteria