1. Cell Theory Prokaryote vs Eukaryote Bacteria/Plant/Animal/Virus

2. The Cell Theory Three Main Ideas 1. All organisms are composed of one or more cells. 2. The cell is the basic unit of organization of organisms. 3. All cells come from pre-existing cells

3. Two Cell Types Prokaryotic Cells– do not contain internal membrane- bound structures (Organelles) Most unicellular organisms such as Bacteria are Prokaryotes. Eukaryotic Cells – contain internal membrane-bound structures. All multi-cellular plants and animals are Eukaryotes

4. Two Cell Types

5. Prokaryotic Cells Characteristics Simple cell Small in size No Nucleus Has Nucleic Acids (DNA/RNA) No Membrane bound Organelles Examples: Bacteria, Yeast

6. Eukaryotic Cells Characteristics Has DNA/RNA Found in Multi-cellular organisms (Plants and Animals) Has Nucleus Complex Cell Has membrane bound organelles

7. Eukaryotic Cells Animal and Plants

8. Virus Cause Sickness or Death Non-Living Has Nucleic Acids (DNA/RNA) Replicates ( Reproduces) by infecting living cells (host)

9. Cells vs Virus Bacteria Animal Plant Virus Prokaryote Cell Eukaryote Cell Eukaryote Cell Not a cell Living Living Living Non-Living Simple Complex Complex Simple No Nucleus Nucleus Nucleus No Nucleus Nucleic Acids Nucleic Acids Reproduces Reproduces Reproduces Reproduces (with host) No Organelles Organelles Organelles No organelles