ZOO 2700 Lecture Notes - Lecture 2: Binomial Nomenclature, Carl Linnaeus, Symplesiomorphy

• School: University of Guelph
• Department: Zoology
• Course: ZOO 2700
• Professor: Alex Smith

Document Summary

Disco clam uses for flashing light on lips of clam: used as a lure for fish, to find mates, defence mechanism (sex, food, warning) 34 tip phylogenetic tree: know how to draw 9 tip tree. Laid foundation off modern biological naming scheme of binomial nomenclature: botanist and zoologist. Synapomorphy- a shared derived character of 2 or more taxa. Monophyletic taxon- includes all the descendants of a single immediate ancestor. Paraphyletic taxon- group that includes some, but not all of the descendants of a stem species. Polyphyletic taxon- group that includes descendants of more than one. Outgroup is a close relative of the members of the ingroup that provides a basis for comparison. Rigorous method for making a dichotomous branching phylogeny for a group of organisms. Degree of relatedness based on number of shared derived characters. In the case of multiple trees, the principle of parsimony is used to resolve conflicts.