1. Classifying Living Things

2. Classifying – grouping things according to similarities
Taxonomy – science of classifying and naming organisms
- The term is derived from the Greek taxis (“arrangement”) and nomos (“law”).

3. Aristotle Greek philosopher
Classified organisms into two kingdoms. Plant Animal
Animal Kingdom – divided into 3 groups
Air Land Water

4. Problem with Aristotle’s system
Frogs
part of life in water
Part of life on land
Needed more logical and finer tuned classification system

5. Carolus Linnaeus Swedish physician and naturalist
Created system to classify organisms based on similarities in body structures and systems
Also; size, color, shape and methods of obtaining food

6. 6 Kingdoms of classification of organisms
Kingdom Monera – has been divided into;
Archaebacteria
Eubacteria

7. Organisms are placed in each kingdom based on characteristics
Presence of nucleus
Single-celled
Many-celled
Ability to make food
Ability to move

8. Finer classification
King
Phillip
Came
Over
For
Good
Spaghetti

9. species Smallest category of classification
Organisms within a species can reproduce and produce fertile offspring

10. Naming of organisms
All organisms need an exact name

11. Binomial Nomenclature- 2 names

12. Binomial nomenclature
Organism’s scientific name
Latin name
Genus name: group of different organism that have similar characteristics
always capitalized
Species name: more precise classification organisms belonging to same species can mate
always lower case
No two organisms have the same name

13. Canis familiaris
Domesticated dog

14. Canis lupus
Grey wolf

15. Canis latrans
Coyote
Latrans – barking dog

16. Dichotomous key – tool used to identify organisms
Dichotomous means "divided in two parts".
At each step of the process of using the key, the user is given two choices;