1. Classification

2. A system of labeling and grouping
Classification
A system of labeling and grouping
Taxonomy is the practice of classifying

3. How do we classify in every day life?
Movies: Horror, action, comedy, drama
Music: Rap, rock, pop, country, electronica

4. Why classify?
Classification adds order and helps us make sense of the world
Classification also tells us how closely related organisms are

5. Linnaeus
Carolus Linnaeus proposed a system where organisms would be classified in hierarchical groups

6. Domain
Kingdom
Phyla
Class
Order
Family
Genus
Species

7. Domain Kingdom Phyla Class Movie Live Action Horror
Order
Family
Genus
Species
Movie
Live Action
Horror
Supernatural horror
Found Footage
Paranormal Activity
Paranormal Activity 4

8. Dear King Phillip Come Over For Good Spaghetti

9. Example: Human Domain: Eukaryotes Kingdom: Animal
Phylum: Chordate (has a backbone)
Class: Mammal
Order: Primate
Family: Hominid
Genus: Homo
Species: Homo sapiens

10. Scientific names Comprised of the genus and species
Human = Homo sapiens
Wolf = Canis lupus
Rose = Rosa rosa
First word capitalized, second word lowercase

11. Language barriers
In the United States the term “buzzard” applies only to vultures
In the United Kingdom, “Buzzard” can mean a hawk.
But Coragyps atratus refers to the American black vulture everywhere

12. Phylogenetic Trees/Cladograms
Visual representations of how organisms are related
Similar to family trees/pedigrees
Also called the“Tree of Life”

14. Nodes
Branches

15. Nodes = Places where speciation occurred, common ancestors
Branches = Individual species

16. Groups next to each other are called sister groups
Humans and armadillos are sister groups in this diagram

17. Horizontal lines show shared derived characteristics

18. Assignment: Dichotomous key

19. 1. Pick 10 aliens and identify them with the dichotomous key
1. Pick 10 aliens and identify them with the dichotomous key. Write this down next to the alien or on a separate paper (identify which aliens you are doing!)
2. Create a dichotomous key for the second set of 10 aliens. Group them based on shared characteristics.

20. How to create the key
Find a characteristic that separates the aliens into two groups. Ex: Do the organisms have hair?
Set up a question:
1) a. The organism has hair Go to 2
b. The organism does not have hair Go to 3
Continue until every species is sorted