17.1 Classification
Think about how things are grouped in a store or in your kitchen to help create order.

 Classification – the grouping of objects based on similarities
 Taxonomy – branch of biology that groups and names organisms based on characteristics

 Aristotle, Greek philosopher 384-322 B.C.
 Plants
 Animals

 Carolus Linnaeus,
Swedish botanist 1707-1788
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Based on structural similarities
Binomial nomenclature – two word naming system in Latin
 Genus species Homo sapiens
 Common name humans

 We still use the system Linnaeus used
 Taxonomic rankings
 Larger groups share traits
 Kingdom
 Phylum
 Class
 Order
 Family
 Genus
 species

Keys to evolutionary relationships
 Similar structure

Keys to evolutionary relationships
 Similar structure
 Breeding behavior

Keys to evolutionary relationships
 Similar structure
 Breeding behavior
 Location

Keys to evolutionary relationships
 Similar structure
 Breeding behavior
 Location
 Chromosome structure

Keys to evolutionary relationships
 Similar structure
 Breeding behavior
 Location
 Chromosome structure
 Biochemistry