BIOL107 Lecture Notes - Lecture 1: Saccharomyces Cerevisiae, Carl Linnaeus, Bacteria

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL107
• Professor: Martin Srayko

Document Summary

Why classify life: social, dietary, cultural, medical, economic reasons, to measure and monitor the diversity of life. Two animals that appear similar may or may not be genetically similar. The management of nature and the biodiversity on earth. Requires a detailed record of all forms of life. Classification of living things (taxonomy: physical structures. Ex. bats and birds have wings, but these structures were not present in theirlast common ancestor. The two wing designs arose independently and are analogous. Owls and magpies have homologous wing structures because they were derived from a common ancestral structure. Homologous: similar in anatomy, similar or dissimilar function. Analogous: not similar in anatomy, similar in function, not inherited from a common ancestor. Note: a dolphin"s flipper, a (cid:271)at"s (cid:449)ing, a (cid:271)ird"s (cid:449)ing, and a human arm are all considered homologous forelimb structures: fossil record fossils can help establish ancestry they are not available for every organism.