Classification I. Classification- The grouping of things according to similar characteristics. a. characteristicstraits, features, qualities
b. classifications systems must be meaningful, easily understood, and easily communicated c. Taxonomy- science of classification
II. Today’s classification system a. has two jobs 1. gives each organism a unique name—genus species 2. groups organisms according to basic characteristics that reflect their evolutionary relationships
III. The First Classification System a. Aristotle- began first system in 4 th century B. C. 1. divided into plants and animals
b. Carolus Linnaeus- 18 th century -Swedish scientist - Today’s classification system is based on his work 1. he developed binomial nomenclature
IV. Binomial Nomenclature a. - each organism is given two names 1. genus- think of your family name 2. species- think of your first name
3. -genus name is capitalized -species name is not -both are written in italics Ex. Canis lupus- wolf Homo sapien- man
Felis concolor puma, mountain lion, cougar
b. 7 major groups of classification Kingdom phylum class order family genus species - largest, most general group - smallest, most specific group -members of a species can mate to produce fertile offspring
King Philip Came Over For Great Soup
Liger = male lion, female tiger
Tigon = female lion, male tiger
tigon
Mule = male donkey, female horse
Branching Diagram
6 Kingdoms 1. Archaebacteria- “ancient bacteria” -autotrophs and/or heterotrophs -live on ocean floor, salty water hot springs -prokaryotes- cells without a nucleus -unicellular
archaebacteria
2. Eubacteria -prokaryotes -autotrophs and heterotrophs -many are helpful -unicellular
eubacteria
3. Protists -autotrophs and heterotrophs -unicellular and multicellular -eukaryotes- cells that have a nucleus -ameba, paramecium, euglenas -algae -kelp