MCB 150 Chapter Notes - Chapter 1.4, 7.1, 21.2, 29.1, ch 4: Ribosomal Rna, Archaea, Cell Membrane
19 Jan 2017
School
Department
Course
Professor
Document Summary
Chapter 4, properties and strategies of cells: all organisms are bacteria, archaea, or. Populations of one species diverges to form a new species. All species trace their ancestry back to a common ancestor. Tree of life: a family tree of organisms. Woese used rrna to compare organisms because all organisms have it and it serves the same purpose in every organism. If natural selection is correct, species that are more closely related should have sequences of rrna that are closer than species that are not closely related. Species that are in the same evolutionary lineage should have changes in rrna that are not found in any other species. The fundamental division between organisms was prokaryotes and eukaryotes and archaea was unknown. Fungi were thought to be closely related to plants, but are actually much more closely related to animals. The traditional family tree is not very evolutionarily accurate.
