Robert Hooke
First described cells while looking at cork
Said they looked like little rooms
Cell Theory
Schwann contributed these 2 parts
1. All organisms are made of one or more cells.
2. The cell is the basic unit of all living things.
Virchow contributed this part
3. All cells come from existing cells
Prokaryotic vs. Eukaryotic Cells
Prokaryotic
Eukaryotic
Nucleus
no
yes
Unicellular
organisms
yes
Yes, in some cases
Multi-cellular
organisms
no
yes
Examples of
organisms
Bacteria & Archaea
Humans, Plants
Membrane covered
organelles
no
yes
Shared
characteristics
DNA
Cell Membrane
Cytoplasm
Ribosomes