Chapter 18: Classification Flashcards
Binomial Nomenclature
Two-word naming system invented by Carolus Linnaeus
Taxonomy
Scientist classify organisms and assign each organism a name
Genus
Group of closely related species
Taxon
Levels of binomial nomenclature
Family
Genera that share characteristics
Order
Level consisting of similar families
Class
Composed of similar orders
Phylum
Group of many different organism that share characteristics
Kingdom
Largest and most inclusive
Phylogeny
Evolutionary relationships.
Evolutionary classification
Strategy of grouping together due to their evolutionary history
Derived characters
Characteristics that appear in recent lineage but not in ancestors
Cladogram
Diagram that shows evolutionary relationships
Molecular clock
Model that uses DNA comparisons to the length of time that two species have been evolving independently
Bacteria
Unicellular and prokaryotic
Archaea
Unicellular and prokaryotic, live in very extreme climates.
Archaebacteria
Corresponds to the domain archaea.
Eukarya
Consists of all organisms that have a nucleus.
Protista
Eukaryotic organism that cannot be classified as animals, plants, or fungi
Fungi
Heterotrophs. Feed on dead or decaying matter.
Plantae
Multicellular organisms.
Animalia
Multicellular heterotrophic. Animals.