BIOL 1070 Lecture Notes - Lecture 3: The Terminal, Field Guide, Phenotypic Plasticity
27 Mar 2016
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Levels of biological organizationthe system that biologists use to classify species reflects this nested hierarchy. As one moves up the hierarchy, the categories become more general and include more and more lower-level categories. That room is one of several in your house. Your house is one of many in your neighbourhood. Your neighbourhood is one of many in your city. Your city is one of many in your province, and so on through your nation (canada), continent (north america), planet (earth), solar system (sol system), galaxy (milky way), and ultimately the universe. It is very much the same with hierarchical taxonomic systems: As we have learned more about the relationships among lineages of living things, our classification system has expanded to include more levels in the hierarchy. At present, this includes domains, kingdoms, phyla (singular: Genus), and species (singular is also species, not specie). Chordata (animals with notochords, including the subphylum vertebrata)
