BIO201H5 Lecture Notes - Lecture 2: Carl Woese, Binomial Nomenclature, Carl Linnaeus
Document Summary
Outline: how many species share our planet with us, hierarchical classification system (human generated, three domain system, defining a species, binomial nomenclature, classifying the diversity of life on earth. Developmental stages: structures in early developmental stages sometimes show evolutionary relationships not evident in adults. Molecular traits: the structures of proteins and the base sequences of nucleic acids. A species is a group of individuals that can breed with one another and produce fertile offspring. Biological species concept (ernst mayr, 1942: the biological species concept states that species can be reproductively isolated from one another. In nature, members of the same species can potentially interbreed. Members of different species cannot interbreed: reproductively isolated. What is the purpose of biological classification: provide unique names of organisms, group organisms based on evolutionary relatedness. Why do we need a unique name for each organism: common name may be confusing, linnaeus: naming species in linnean classification, each species is given a two-part name: binomial nomenclature.
