1. Taxonomy Classify The science of classifying organisms.
To arrange according to similarities or differences.

2. Why classify?
Biologists use classification to organize living things into groups so that the organisms are easier to study. We classify to make our lives easier.

3. History of Taxonomy

4. Aristotle Simple classifications Used common names Plant or animal?
If an animal does it have blood?
does it
Fly
Swim
Walk/Crawl

5. DISCUSSION QUESTION - Using Aristotle's 3-group system (based on movement), name 2 animals that would fit each of the 3 groups.

6. Problems with this system?
Some animals can walk, swim, and fly

7. What technology helped scientist improve the classification system?
Microscope s

8. Carolus Linnaeus 1700s
Described organisms with two word names, instead of polynomials
Developed binomial nomenclature
First word = Genus name (Capitalized)
Second word = species name (lowercase)
scientific name
Example Canis lupus
Always italicized or underlined

9. Why binomial nomenclature?
Binomial - 2 name
Nomenclature – naming system
Much easier than a 10+ word name under old “polynomial system”
Same name no matter where you go (Latin)
Less confusion

10. Devil Cat

11. Ghost Cat

12. Mountain Lion

13. Screaming Cat

14. Puma

15. Florida Panther

16. Cougar

17. Felis concolor

18. Taxonomic Hierarchy
Names organisms and their relationships from very broad to very specific

19. Classification of Living Things

20. Milky way Solar System Earth U.S. Ohio Westerville Mainsail Dr. 283

21. Domain Kingdom Phylum Class Order Family Genus Species

22. Three Domains of Life
There used to be 2, why do you think there are 3 now?

23. Domain Archaeabacteria: Life's Extremists
Domain Archaeabacteria: Life's Extremists...! Archaea are found in the harshest environments on Earth, and are the oldest known organisms on Earth, appearing in the fossil record over 3.6 BILLION years ago (3,600,000,000 years ago!)

24. Domain Bacteria (or Eubacteria):
is familiar to most people when associated with human or animal disease. However, most bacterial species do not (and cannot) cause disease.
Most species even play beneficial roles for humans by producing antibiotics and food.

25. Domain Eukarya
A single-celled or multicellular organism whose cells contain a distinct membrane-bound nucleus.
(Organism’s cell has a nucleus.)

26. Domain Kingdom Phylum Class Order Family Genus Species

29. Pro = before

35. Why has taxonomy changed throughout history?
Do you think it will continue to change?

37. Prokaryotes
We are now filling out our charts

39. Archaea
Unicellular prokaryotes
Autotrophs
Cell wall

43. Eukaryotes
Eu = true
Have membrane bound nuclei

45. Most are unicellular

51. Phylum examples
Chordata Cord Chordates Hollow dorsal nervous chord, notochord, pharyngeal slits, endostyle, post-anal tail about 100,000+ Cnidaria Stinging nettle Coelenterates Nematocysts (stinging cells) about 11,000 Ctenophora Comb bearer Comb jellies Eight "comb rows" of fused cilia about 100 modern species Cycliophora Wheel carrying Symbion Circular mouth surrounded by small cilia

52. Classification of Humans
Kingdom Animalia
Phylum Chordata
Class Mammalia
Order Primates
Family Hominidae
Genus Homo
Species sapiens

53. Is your table filled out?
Don’t lose it!!!