is the science of classifying and naming of organisms
Kingdom Phylum Class Order Family Genus Species
rod-shaped structure that provides support in all chordates and protects spinal cord.
Refers to the use of a criterion of overall similarity to classify organisms into taxa; contrasts with classifications based explicitly on a reconstruction of phylogeny. Can be translated into an evolutionary tree
the named taxonomic unit at any level of the hierarchy.
An approach to systematics in which organisms are placed into groups called clades based primarily on common descent
shared derived characteristics
phenotypic features shared by two or more taxonomic groups that are derived from a common ancestor and are not found in other groups