BIOLOGY 3 Lecture Notes - Lecture 26: Base Pair, Parallel Evolution, Antibody
Document Summary
Aristotle classified life into 14 groups (e. g. , mammals, birds, etc. Ray grouped animals and plants according to how he thought they were related. Linnaeus grouped plants by flower parts; his categories were published in systema. Naturae in 1735 today, we use a minimum of 7 categories of classification: Kingdom, phylum (or division for plants), class, order, family, genus & species. A higher category, the domain, has been proposed to be added to these 7 categories the higher the category, the more inclusive it is. Members of a kingdom share general characters; members of a species share quite specific characters. Characters are any structural, chromosomal, or molecular feature that distinguishes groups. Additional levels of classification can be added by adding super-, sub-, or infra- (e. g. , suborder) Systematics is the study of the diversity of organisms using information from cellular to population levels. Classification reflects phylogeny; one goal of systematics is to create phylogenetic trees.
