| Questions | Answers |
|---|---|
| first person to observe cells | Robert Hooke |
| the smallest unit in a organism | cell |
| organisms whose cells have a nucleus | Eukaryote |
| observed that animals are made of cells | Schwann |
| single-celled organism without a nucleus | Prokaryote |
| observed that plants are made of cells | Schleiden |
| stated that cells are created from other cells | Virchow |