Please enable JavaScript.
Coggle requires JavaScript to display documents.
18- Classification and Systematics (Levels of Taxonomic Categories (genus-…
18- Classification and Systematics
Concepts
Phylogenies
hereditary relationships of any groups of organisms
evolutionary history of each member of group
Systematics
understand each evolutionary line
system of names (nomenclature)
Natural System of Classification
closely related organisms are classified together
Levels of Taxonomic Categories
Most fundamental level of classification
species
genus- closely related species are grouped together in this.
monophyletic
common ancestor
polyphyletic
evolved from different ancestors
Binomial system nomenclature
has both genus and species epithet
Linnaeus
family- level above genus / most are well defined
Kingdom/Division/Class/Order/Family/Genus/Species/Common Name
Cladistics
method of analyzing these phylogenetic evolutionary relationships
synamorphies (homologous feature)
natural selection favors mutations
homoplasies (analogous features)
Other types of Classification Systems
Artificial systems of classification
ex. roadside floras, picture guides.
easy plant identification
only used ad adjuncts to natural systems
