Phylogenies and Tree-Thinking

1. Phylogenies and Tree-Thinking by David Baum & Susan Offner The American Biology Teacher April, 2008 PowerPoint presentation compiled by Larry Flammer, ENSI webmaster From Phylogenies & Tree-Thinking. David A. Baum and Susan Offner. The American Biology Teacher, 70(4), 222-229. With the kind permission from the National Association of Biology Teachers and David Baum.

2. Figure 1Hypothetical genealogy of local population of plants

3. Fig. 2. How genealogy of sexual population is included in a phylogenetic tree

4. Fig. 3. Tree diagram is meant to represent an actual history of evolutionary lineages that have branched over time

5. Fig. 4. Four trees, all depict same evolutionary history

6. Fig. 5. Some important terms used to describe phylogenetic trees

7. Fig. 6. How to read a tree in terms of evolutionary relationships

8. Fig. 7. Three trees, all depict the same evolutionary history

9. Fig. 8. A clade includes all and only the descendants of a paticular ancestor

10. Fig. 9. How trees show evolutionary history