ClassificationClassificationGrouping similar organisms together

TaxonomyTaxonomyscience of identifying, naming and

classifying organismsfirst developed by Carl Linneaus in

1750’sbased on morphology (body

shape/form)uses a 2 part Latin naming system

called binomial nomenclature1st word is the genus, 2nd the speciesHomo sapien (H. sapien)Ursus americanus Ursus maritimus

species further grouped into different levels (taxa)

each level higher, organisms are less related

PhylogenyPhylogenyevolutionary development of a gp

of organismsuse fossils, DNA analysis &

proteinsmore similar DNA & proteins are

more closely related 2 things are

Phylogenetic TreesPhylogenetic Treeshypothesis of the evolutionary

relationships

CladesCladestip of a branch on a phylogenetic

treeshows an ancestor species and

all its descendants

Dichotomous KeyDichotomous Keyway of determining the correct

species of an organism

• it uses a series of paired comparisons to sort organisms into smaller and smaller groups

• ex Musicians

Male Female

Rap Pop From Napanee Not From Napanee