1. Biology Chapter 7 Section 1
Objectives: Students will
Identify five scientist’s contributions to the cell theory
List the three parts of the cell theory
Compare prokaryotes and eukaryotes
Compare plant, animal cells and viruses

2. …..the smallest units of Life. Ch. 7-1
CELLS
…..the smallest units of Life.
Ch. 7-1

3. Obj. A) Identify five scientist’s contributions to the cell theory
Anton van Leeuwenhoek
First to study nature with microscope

4. Obj. A) Identify five scientist’s contributions to the cell theory
Robert Hooke
Studied slice of cork in microscope
Monastery reminder - cells

5. Obj. A) Identify five scientist’s contributions to the cell theory
Matthias Schleiden – plants
Theodor Schwann – animals
Rudolf Virchow – cell reproduction

6. B) List the three parts of the cell theory
All organisms are composed cells
The cell is the basic unit of life
All cells come from pre-existing cells

7. C) Compare prokaryotes and eukaryotes
Two basic cell types:
Eukaryotic Cells
Evolved from Prokaryotic?
Contain a nucleus with DNA
Have mitochondria
Also have cell membrane, ribosomes & cytoplasm
Have organelles
Prokaryotic Cells
Earliest cells
No nucleus
No mitochondria
Have membrane, cytoplasm, free ribosomes & free DNA
Lack membrane bound organelles

8. An Organelle Is: An organ of the cell.
Has its own job like the organs of our body

9. Examples Prokaryotic cells: Bacteria

10. Human muscle cells with large nuclei Examples Eukaryotic cells
Does anyone know this cell? Eukaryote or prokaryote?

11. Eukaryotic Cells: Diatoms = algae and plankton
Nucleus
With DNA
For reproduction
Is this a euk or prok? Why Eukaryote?

12. Eukaryotic Cells: Dinoflagellate = plankton
Nucleus
With DNA
For reproduction
Euk or Prok? Why?

13. Eukaryotic Cells: Animal Paramecium
Nucleus
With DNA
For reproduction
Euk or Prok? Why?

14. Our Red Blood Cells
Exception:
A Eukaryotic Cell
With NO NUCLEUS

15. Obj. D) Compare plant, animal cells, and viruses.
What are some differences between animal and plant cells?
ANIMAL PLANT

16. Organelles found only in Plants:
Obj. D) Compare plant, animal cells, and viruses.
Organelles found only in Plants:
Cell Walls
Cellulose
Chloroplasts
Large Vacuole

17. Plant Cell
1. Chloroplast = absorbs light, makes sugar through photosynthesis = GREEN
2. Cell Wall = rigid outer structure, made of cellulose (fiber)
Cellulose = carbohydrate found in cell walls
3. Large Vacuole = removes liquid waste

18. 1. No Wall, Just a Cell Membrane Compared to Plants: Animal Cell
Obj. D) Compare plant, animal cells, and viruses.
1. No Wall,
Just a Cell
Membrane
Compared to Plants:
Animal Cell

19. Organelles found only in Animal cells:
Obj. D) Compare plant, animal cells, and viruses.
Organelles found only in Animal cells:
2. Centrioles = involved in cell division

20. What are viruses? Not cells. Need host to survive. Contain DNA or RNA
Obj. D) Compare plant, animal cells, and viruses.
What are viruses?
Not cells.
Need host to survive.
Contain DNA or RNA
Inject into host

21. Exit Ticket –Complete the following for a summary:
3-2-1
3 things I learned,
2 things I have questions about and
1 thing I will never forget
Show it to me for sign.