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Lesson 3

Taxonomy

TermDefinition
Taxonomy a systematic process of classifying living organisms into different groups based on their physical traits and genetic relationships
Domain highest and broadest level of classification
Taxonomist a scientist who studies taxonomy
Domain Bacteria consists of unicellular prokaryotes, surrounded by a thick cell wall
Domain Archaea consists of unicellular prokaryotes, surrounded by a cell wall that lacks the substance peptidoglycan
Domain Eukarya consists of multicellular (but sometimes unicellular) eukaryotes
dichotomous key type of flow chart made up of questions or paired statements about an organism
cladogram a branched diagram resembling a tree that shows the evolutionary relationship among organisms
nodes places where a lineage branches off in a cladogram
Aristotle one of the first scientists to group and categorize living things based on their characteristics
Carolus Linnaeus an 18th century scientist who focused his studies on plants. (Father of Taxonomy)
Kingdom 2nd broadest level of classification, after domain
phylum 3rd broadest level of classification, after kingdom
Class 4th broadest level of classification, after phylum
order 5th broadest level of classification, after class
family 6th broadest level of classification, after order
genus 7th broadest level of classification, after family
species 8th broadest level of classification, after genus
binomial nomenclature Organisms are commonly referred to according to the two most specific taxonomic levels: genus and species (normally in Latin)
Created by: jell6041