1. Classification of Living Things
Diversity of Life

2. What is classification?
Classification is the grouping of things according to characteristics
The science of classifying organisms is known as taxonomy

3. Early classification systems
Aristotle grouped animals according to the way they moved
John Ray was the first to use the term “species”

4. Binomial Nomenclature
Developed by Linnaeus
Two-name system
Each organism has a genus and a species name
First name (genus); second name (species)

5. What is a scientific name?
Combination of the genus and species name of an organism
Scientific names of organisms are always italicized or underlined: (Genus is capitalized; species name is lower-case)

6. Questions
What is classification?
Why is classifying living things important?
What is taxonomy?
Describe binomial nomenclature.

7. Questions
Who developed a system for naming living organisms?
For what is John Ray known?
What is a scientific name of an organism and how is it written?

8. Seven classification groups of living things
Kingdom
Phylum
Class
Order
Family
Genus
Species

9. Questions
What are the seven classification groups?
Kings Play Cards On Fat Green Stools

10. The Dichotomous Key
A key is a device for easily and quickly identifying
an unknown organism.
The dichotomous key is the most widely used type in biological sciences.
The user is presented with a sequence of choices between two statements, couplets, based on characteristics of the organism. By always making the correct choice, the name of the organism will be revealed.

12. 1.  
A. one pair of wings
B. Two pairs of wings

13. • Domain Archaea The Three Domains Domain Bacteria Domain Eukarya
Includes newly discovered cell types
Contains 1 kingdom – the Archaebacteria
Domain Bacteria
Includes other members of old kingdom Monera
Has 1 kingdom – the Eubacteria
Domain Eukarya
Includes all kingdoms composed of organisms made
up of eukaryotic cells
– Protista
– Fungi
– Animalia
– Plantae

14. A group at any level is a taxon.
The major classification levels, from most general to most specific
(several of these have subdivisions)
A group at any level is a taxon.

15. Categories within Kingdoms
Kingdoms are divided into groups called phyla
Phyla are subdivided into classes
Classes are subdivided into orders
Orders are subdivided into families
Families are divided into genera
Genera contain closely related species
Species is unique
Categories within Kingdoms