1. Cell Diversity

2. Types of Organisms Unicellular – composed of a single cell
Multicellular – composed of many cells

3. Prokaryotic Cells Simple cells Single celled organisms
Examples: bacteria and blue green algae
No Nucleus
No membrane bound organelles
DNA Circular segment of DNA in cytoplasm

4. Eukaryotic Cells More complex Single celled (protist)
Multicellular (protist, fungi, plant, aniaml)
Well defined nucleus
Membrane bound organelles
DNA as chromosomes in the nucleus

5. Eukaryotic Cells How did eukaryotic cells form?
Prokaryotic cells began evolving internal membranes
Some prokaryotic organisms were engulfed or consumed by others
Became symbiotic inclusions in the bigger cells
Eventually evolved into organelles like mitochondria and chloroplasts (endosymbiotic theory)
How did eukaryotic cells form? 1 2 3 4 5

6. Types of Cells Both Prokaryote Eukaryote Have a nucleus
Unicellular
No Nucleus
Lack major organelles
Have cell membrane
Contain DNA
Have a nucleus
Contain organelles

7. http://www.youtube.com/watch?v=gfzVW G2DnQ4&feature=related

8. Cell Specialization
Cell specialization – cells do different tasks

9. Levels of Organization
Within a multicellular organism, there are different levels of organization
Cell
Tissue - Group of similar cells that perform a particular function
Organ - Group of similar tissues that perform a particular function
Organ System - Group of organs that work together to perform a specific function
Organism