–      the study of categorizing organisms


Binomial Nomenclature – two-part scientific naming of organisms

–      the first word identifies the genus and the second word is the species

Example: Ursus americanus –

Ursus horribilis –

Ursus arctos –

Ursus maritimus

NOTE: the format: capitals and italics

Levels of Classification (7) or Taxa:

“King Philip Came Over From Germany Swimming”

Example:        HUMAN                  Dandelion

Kingdom Animalia Plantae
Phylum Chordate Tracheophyta
Class Mammalia Angiospermae
Order Primates Asterates
Family Homoinidae Compositae
Genus H*mo Taraxacum
Species sapiens officinale


  1. Eubacteria – cell without a nucleus with rigid cell wall (peptidoglycan)
  2. Archabacteria – cell without a nucleus living in harsh conditions
  3. Protista – cell with a nucleus
  4. Fungi – multi-cellular heterotrophs with a cell wall
  5. Plantae – multi-cellular autotrophs
  6. Animalia – multi-cellular hetertrophs without a cell wall

Prokaryotic cells – do not have a nucleus

Eukaryotic cells – have a membrane bound nucleus

Phylogeny – history of evolution of organisms (phylogenetic tree)

Dichotomous Key – a two part key used to identify living things

author avatar
William Anderson (Schoolworkhelper Editorial Team)
William completed his Bachelor of Science and Master of Arts in 2013. He current serves as a lecturer, tutor and freelance writer. In his spare time, he enjoys reading, walking his dog and parasailing. Article last reviewed: 2022 | St. Rosemary Institution © 2010-2024 | Creative Commons 4.0

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