1. CATEGORIES OF BIOLOGICAL CLASSIFICATION
Taxonomy – the science of naming and classifying organisms
polynomial – “many” names, in
the 1700’s descriptive phrases were
used to name organisms resulting
in many names that caused confusion

2. Carl Linnaeus – a Swedish biologist who developed the two-word Latin name for each species
binomial nomenclature – a two-word Latin system for naming organisms developed by Linnaeus

3. scientific name – the two-part name for a species; the first word is the genus classification; the second word is the species classification
ex: Homo sapiens (humans)
Canis familiaris (dog)
Canis lupus (wolf)

4. II. Rules for Naming Organisms
All scientific names must have 2 Latin words.
Two different types of organisms can not have the same scientific name.
The first letter of the genus name is capitalized; the first letter of the species name is lowercase.
Scientific names are italicized or underlined.

5. After the first use of the full scientific name, the genus can be abbreviated as a single letter.
Ex: Homo sapiens H. sapiens
Canis familiaris C. familiaris

6. III. HOW BIOLOGIST CLASSIFY ORGANISMS
*Biologist classify organisms based on appearance, structure, breeding patterns, and similarities in DNA sequence.

7. Eight Levels of Classification:
Domain
Kingdom
Phylum (Phyla)
Class
Order
Family
Genus
Species
Mneumonic:
Dear
King
Philip
Came
Over
For
Good
Soup
makes up Scientific Name!!!

8. Levels of Classification:
Frog
Domain - Eukarya
Kingdom - Animalia
Phylum - Chordata
Class Amphibia
Order Anura
Family - Ranidae
Genus – Rana
Species - catesbiana * *

9. * *

10. Lizard Snake * * Eukarya Animalia Chordata Reptilia Squamata
Gekkonidae
Gekko
gecko
Snake
Eukarya
Animalia
Chordata
Reptilia
Squamata
Viperidae
Agkistrodon
contortrix
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species * *

11. *Each level of classification is based on characteristics
Most Inclusive/Least Specific
Most Inclusive
/Least Specific
Least Inclusive/Most Specific
*Each level of classification is based on characteristics
shared by all the organisms it contains. If two organisms
belong to the same order what other taxons/levels do they share?

12. Levels of Classification
Most Inclusive/
Least Specific
Least Inclusive/
Most Specific

13. Levels of Classification
Domain
basic unit of biological classification