1. 3.1 Cell Theory

2. Discovery of cells Robert Hooke
Examined slices of cork (outer bark of oak tree) under microscope
Saw empty little “compartments” and named them cells
Cork is composed of dead cells
Hooke was only viewing cell wall

3. Important Scientists Robert Hooke Leeuwenhoek
Made better microscope lens to view cells in more detail
Schwann
All living things are made of cells
Virchow
All cells come from other cells

4. Cell Theory All organisms are made of cells
All existing cells are produced by other living cells
The cell is the most basic unit of life

5. Prokaryotes vs Eukaryotes
Prokaryotic cells
NO nucleus or membrane bound organelles
DNA suspended in cytoplasm
Microscopic single celled organisms
Eukaryotic cells
Have a nucleus and other membrane bound organelles
Genetic information is in nucleus
May be multicellular (like you) or unicellular.
Cytoplasm: jellylike substance that contains dissolved molecular building blocks
Organelle: structures that preform distinct tasks in cell