1. Introduction to Cellular Biology

2. Essential Questions What is the cell theory?
What are the characteristics of prokaryotes and eukaryotes?

3. Life is Cellular Discovery of the cell:
Year: 1665
Scientist: Robert Hooke
Equipment: microscope
Robert Hooke found the first cell by looking through his microscope
The microscope was improved by Anton Van Leeuwenhoek.

4. Cell Theory All living things are composed of cells
Cells are the basic units of life
Basic units of structure and function
New cells are produced from existing cells.
Schleiden,Schwann,Virchow all made contributions to the cell theory.
Can be single celled (___ cellular) Example: Amoeba, bacteria
Can be many celled (_____ cellular) Example: Humans

5. THE CELL Cells come in a variety of shapes and sizes
All have 2 characteristics in common
Cell membrane- surrounds the cell like a barrier
Contains DNA

6. Two Broad Categories Prokaryote & Eukaryote

7. Prokaryotes No membrane around DNA (lack a nucleus)
Don’t have membrane-bound organelles
Small and simple
Examples:
Bacteria

8. Eukaryotes Contain a nucleus Have organelles Larger and more complex
Specialized cell organs
Larger and more complex
Example:
Muscle cell
Skin cell

9. Plant Cells Chloroplasts Have a cell wall -Site of Photosynthesis
Provides strength and protection

10. Animal Cell Lysosomes Have centrioles -Aid in cell division
-Digestive enzymes
Have centrioles
-Aid in cell division
Found at right angles to each other and come in pairs