1. 18.3 Kingdoms and Domains

2. Updates to Linnaeus’ System a. Some organisms had to be reclassified as we learned more -Example: Sponges had to be reclassified from plants to animals when microscopes were used to see the type of cells they had. b.Changed from 2 to 6 kingdoms. -Linnaeus- 2 kingdoms (plants, animals) -Now- 6 kingdoms!

3. Sponges

4. Organisms Classified Using Five Characteristics: 1. Cell Type- Prokaryote or Eukaryote 2. Cell Wall- Does it have one? 3. Body type- Unicellular or multicellular 4. Nutrition- Heterotroph or autotroph 5. Genetics-Similiarities in DNA.

5. Three Domains: 1.Bacteria-Unicellular prokaryotes that have a strong cell wall and unique genetic system. Same as the eubacteria kingdom. 2. Archaea-Unicellular prokaryotes that have chemically unique cell walls. They live in extreme environments. Same as the Archeabacteria kingdom. BRAIN POP!BRAIN POP! 3. Eukarya-Organisms made up of eukaryotic cells. (Plants, animals, fungi and protists).

6. Characteristics of Eukaryotes Plants-Autotrophs (make their own food). - Cell Walls (made of hard cellulose) -Mostly multi-cellular

7. Characteristics of Eukaryotes Animals-Heterotrophs (must consume food) -No cell wals -Multi-cellular

8. Characteristics of Eukaryotes Fungi-Heterotrophs -Cell wall (made of hard chitin) -Mostly multi-cellular

9. Characteristics of Eukaryotes Protista-The “left overs” kingdom -Autotrophs or heterotrophs -Cell wall or no cell wall -Multi-cellular or uni-cellular

10. BRAIN POP II!