Today’s Objectives TSW be able to recite the levels of taxonomic hierarchy. TSW be able to name the six kingdoms TSW be able to identify systematics types.

What is a taxon? What are the 7 levels of hierarchy? Taxonomic Hierarchy What is a taxon? What are the 7 levels of hierarchy? A taxon is a group of animals that share a particular set of characteristics. Kingdom, phylum, class, order, family, genus, and species.

Carolus Linnaeus Binomial nomenclature system A Note on NOMENCLATURE Carolus Linnaeus Binomial nomenclature system

The Six Kingdom System Archaebacteria Eubacteria Fungi Protista Plantae Animalia

Systematics Evolutionary systematics Organisms will resemble each other and their ancestor more than distant organisms Homologies – result from common ancestry Analogies – result from common evolutionary pressures

Systematics Numerical taxonomies Organisms grouped according to mathematical formulae based on OVERALL similarities Deal only with closely related taxa

Systematics Cladistics Emphasize homologies – synapomorphies Tries to show evolutionary relationships in a group Produces cladograms

Sample Cladogram

Systematics Molecular systematics Molecular clocks Compares sequences of amino acids or nitrogenous bases