1. 7.1 Cell Discovery and Theory

2. I. History of the Cell Theory
Robert Hooke
1665
Looked at a piece of cork
Small, box-shaped structures
Named cellulae (small rooms)

3. I. History of the Cell Theory
B. Anton van Leeuwenhoek
Late 1600’s
Discovered living organisms in pond water, milk, and various other substances

4. II. The Cell Theory All organisms are composed of one or more cells.
Cell is the basic unit of structure and organization of organisms.
All cells come from preexisting cells.

5. III. Prokaryotic Cell Simple structure Contains a plasma membrane
Does not contain membrane-bound organelles

6. IV. Eukaryotic Cell More complex structure Contains a plasma membrane
Contains membrane-bound organelles

7. 1. Which is not a part of the cell theory?
Cells are the basic unit of structure and organization of all living things.
All living things are composed of one or more cells.
Cells arise only from previously existing cells
Cells are produced spontaneously as an organism grows
Answer: D

8. True or False
All cells, whether eukaryotic or prokaryotic, have a plasma membrane. Answer: True

9. 3. What feature of eukaryotic cells has enabled them to develop more specific functions than prokaryotic cells?
Nucleus
Organelles
Genetic material (DNA)
Larger cell size
Answer: B

10. Cell Size

11. The History of Cell Theory

12. Animal Cell

13. Plant Cell