BIOLOGY 207 Lecture Notes - Lecture 1: Prokaryote, Cyanobacteria, Stromatolite
Document Summary
On this tree, there is vertical descent, which means that moving from an ancestor to its descendants, the tree splits vertically: so newest species at the top, oldest ancestors at the bottom. Branches from prokaryotes to eukaryotes demonstrates the endosymiotic theory. Darwins tree of life had clear ideas of speciation as well as extinction (shown by branches that do not make it to the top representing present time. No cumulative final, just another hourly exam (the fourth) during finals week. Best 10/12 quizzes kept, 20% of grade. 80% of grade are the four exams; best is upweighted by 50%, worst is down weighted by. Use the lecture guide as a tool for studying. Kingdoms are no longer used, now use clades and domains. First 3 billion years, not much happened. The past billion year was the one in which everything that we are interested in happened. Smaller red arrows denote major good events, those of great diversity.
