1. Chapter 18
Classification

2. Classification
Organisms and species are classified in a certain manner
Each species has its own name
Latin
Carolus Linnaeus’ classification system
Each species given a two
part name
Italicized or underlined
Ursus arctos

3. Classification Genus Species A group of closely related species.
First part of the name and is capitalized.
Species
Unique to each organism.
Lowercased.

4. Linnaeus Classification
Linnaeus's seven levels of classification are—from largest to smallest—
Kingdom Kings King
Phylum Play Phillip
Class Chess Cried
Order On Out
Family Funny For
Genus Green Good
Species Squares Soup

5. Genus & Species Family Order Class
Linnaeus’s hierarchical system of classification uses seven taxonomic categories. This illustration shows how a grizzly bear, Ursus arctos, is grouped within each taxonomic category. Only some representative species are illustrated for each category above the species level.
Class

6. Phylum
Kingdom
Linnaeus’s hierarchical system of classification uses seven taxonomic categories. This illustration shows how a grizzly bear, Ursus arctos, is grouped within each taxonomic category. Only some representative species are illustrated for each category above the species level.
The kingdom is the largest and most inclusive of Linnaeus's taxonomic categories.

7. Grizzly bear Black bear Giant panda Red fox Abert squirrel Coral snake
Sea star
Linnaeus’s hierarchical system of classification uses seven taxonomic categories. This illustration shows how a grizzly bear, Ursus arctos, is grouped within each taxonomic category. Only some representative species are illustrated for each category above the species level.

10. Kingdoms 6 main Kingdoms Eubacteria Archaebacteria Protista Fungi
Plantae
Animalia

11. The Tree of Life Evolves
Changing Number of Kingdoms
Introduced
Names of Kingdoms
1700’s
Plantae
Animalia
Late 1800’s
Protista
Plantae
Animalia
1950’s
Monera
Protista
Fungi
Plantae
Animalia
This diagram shows some of the ways organisms have been classified into kingdoms over the years. The six-kingdom system includes the following kingdoms: Eubacteria, Archaebacteria, Protista, Fungi, Plantae, and Animalia.
Archae-bacteria
1990’s
Eubacteria
Protista
Fungi
Plantae
Animalia
Copyright Pearson Prentice Hall

12. Domains The Three-Domain System The three domains are:
Based on molecular/DNA data
The domain is a more inclusive category than any other—larger than a kingdom.
The three domains are:
Eukarya, - protists, fungi, plants, and animals.
Nucleus present
Bacteria, - kingdom Eubacteria.
Prokaryotes
Archaea, - kingdom Archaebacteria
Ancient Prokaryotes

13. 3 Domains
Archaea
Bacteria
Eukarya