1. The Two Cell Types

2. There are two basic cell types:  Prokaryotic cells are simple cells Prokaryotic cells  Eukaryotic cells are more complex Eukaryotic cells  Prokaryotic cells are simple cells Prokaryotic cells  Eukaryotic cells are more complex Eukaryotic cells

3. Prokaryotes  No nucleus  No internal compartments (these are also known as organelles)  Cells are very small- about.1 – 1 µm Example: Vibrio (a type of bacteria)  No nucleus  No internal compartments (these are also known as organelles)  Cells are very small- about.1 – 1 µm Example: Vibrio (a type of bacteria)

4. A typical prokaryotic cell

5. Eukaryotes  DO have a nucleus  DO have internal compartments (organelles)  Usually very complex in structure  Cells are larger- >1 µm  Example: a cheek cell or paramecium  DO have a nucleus  DO have internal compartments (organelles)  Usually very complex in structure  Cells are larger- >1 µm  Example: a cheek cell or paramecium

6. A typical eukaryotic cell

7. Relative Cell Sizes

8. Can you tell which is which?

15. Can you tell which are which?