Discipline of classifying organisms and assigning each organism a universally accepted name.
Each species is assigned a two-part scientific name.
A group of closely related species.
The group or level of organization into which organisms are classified.
A group of genera that share many characteristics.
A group of similar families.
A group of similar orders.
A group of closely related classes.
A large taxonomic group, consisting of closely related phyla.
What is Linnaeus's system of classification?
Kingdom, phylum, class, order, family, genus, species.
Why do scientists avoid using common names when discussing organisms?
So that biologists can be certain that everyone is discussing the same organism.
How are evolutionary relationships important in classification?
Biologists now group organisms into categories that represent lines of evolutionary descent, or phylogeny, not just physical similarities.
How can DNA and RNA help scientists determine evolutionary relationships?
Similarities in DNA can be used to help determine classification and evolutionary relationships
the study of evolutionary relationships among organisms
method of grouping organisms together according to their evolutionary history
characteristic that appears in recent parts of a lineage, but not in its older members
diagram that shows the evolutionary relationships among a group of organisms
model that uses DNA comparisons to estimate the length of time that two species have been evolving independently
What are the six kingdoms of life as they are now identified?
Eubacteria, Archaebacteria, Protista, Fungi, Plantae, and Animalia
What is the three-domain system of classification?
Eukarya, Bacteria, and Archaea
most inclusive taxonomic category; larger than a kingdom
domain of unicellular prokaryotes that have cell walls containing peptidoglycans
kingdom of unicellular prokaryotes whose cell walls are made up of peptidoglycan
domain of unicellular prokaryotes that have cell walls that do not contain peptidoglycan
kingdom of unicellular prokaryotes whose cell walls do not contain peptidoglycan
including protists, plants, fungi, and animals
kingdom composed of eukaryotes that are not classified as plants, animals, or fungi
kingdom composed of heterotrophs; many obtain energy and nutrients from dead organic matter
kingdom of multicellular photosynthetic autotrophs that have cell walls containing cellulose
kingdom of multicellular eukaryotic heterotrophs whose cells do not have cell walls