BIOL 2010 Chapter Notes - Chapter 26: Phylogenetic Tree, Binomial Nomenclature, Divergent Evolution
Document Summary
Systematics: study of biological diversity and evolutionary relationships. This idea is constantly changing and being altered with new information. Domain, kingdom, phylum, class, order, family, genus, species. Number of species in each group decreases as you go down. The limiting characteristics get more speci c as well. Genus name and species name makes up the scienti c name. Anagenesis: species formation without branching of the phylogenetic tree. Clade: common ancestral species and its descendant species. Monophyletic group: a taxon that is a clade. New research sometimes reveals that not all clades are monophyletic. Paraphyletic group: common ancestor and some of its descendants. Polyphyletic group: members of several evolutionary lines and does not include the most recent common ancestor of the lineages. Homology: similarity that occurs due to descent from a common ancestor. Ex) arm of a human, wing of a bat, and the ipper of a whale. Analogous: similarity that occurs due to a common need.
