Classification

History

• Aristotle organized living things into 2 main categories:–Plants

–Animals

Plants

Plants were then separated according to their stems:

–Trees

–Shrubs

–Herbs

Animals

Animals were separated according to their habitat:

–On land

–In the air

–In water

Modern Classification

• Carolus Linnaeus

• Organisms are organized according to similar characteristics

• Came up with the 7 orders of taxonomy

• Universal – latin is used

Taxonomy

• Kingdom

• Phylum

• Class

• Order

• Family

• Genus

• Species

DOMAIN

• New level of classification

• Most broad

• Includes– Archaebacteria – bacteria living under

extreme conditions– Eubacteria – the Germs– Eukaryote

Binomial Nomenclature

• Linnaeus’ 2 name naming system

• 1st name = genus • 2nd name = species• Only 1st word is

capitalized and both words are underlined seperately

• Ex. Homo sapien

Relationships

• The more taxon 2 organisms have in common, the more similar they are

• They have similar traits and body shapes

• Ex. Canis familiaris and Canis lupus