Dr. Dennis O'Neal of Palomar College designed this site to introduce students to a tutorial on the Classification of Living Things. Topics addressed at this site include the Linnaen system of classification, amount of species in our world, the importance of biological diversity, the history of classification, and the relevancy of classification in the present day. There are links to the Main Menu, a Practice Quiz, and the other topics in the tutorial including Principals of Class, Kingdom to Subphylum, Class, and Subclass to Infraclass. Additionally, to link to a comprehensive glossary of relevant terms click on the Ecological Niches or Natural Selection links at the bottom of the site. For users with QuickTime there are several sound files that provide correct pronunciation of key terms.