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OEB 192 – 08.09.24 “Evolutionary speculation constitutes a kind of metascience, which has the same intellectual fascination for some biologists that metaphysical.

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Presentation on theme: "OEB 192 – 08.09.24 “Evolutionary speculation constitutes a kind of metascience, which has the same intellectual fascination for some biologists that metaphysical."— Presentation transcript:

1 OEB 192 – 08.09.24 “Evolutionary speculation constitutes a kind of metascience, which has the same intellectual fascination for some biologists that metaphysical speculation possessed for some mediaeval scholastics. It can be considered a relatively harmless habit, like eating peanuts, unless it assumes the form of an obsession; then it becomes a vice” (Stanier, 1970)

2 Linnaean classification Two major characteristics KingdomAnimalia PhylumChordata ClassMammalia OrderPrimates FamilyHominidae Genus Homo Speciessapiens

3 Tree of Life: primary divisions

4

5 Tree of Life: three “domains” Based on 16S rRNA (Woese, 1987):

6 Tree of Life: three “domains” Based on 16S rRNA (Pace, 1997):

7 Tree basics: meaning

8 Tree basics: rotation

9 Tree basics: shape

10 Tree basics: lengths, unrooted cladograms vs. phylograms

11 Tree basics: character change

12 Key phylogenetic terms

13 Monday (9/29): Molecular evolution and horizontal gene transfer I. p.s.- No office hours today after class...

14 Upcoming talks in microbial evolution… Wednesday, 9/24 Marx & Girguis labs open house 6:30 – 8 pm, 3081 Biolabs All are welcome to come enjoy a beer and snacks and learn about work in our labs…

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