1. CELL LAB REVIEW

2. ALL EUKARYOTIC CELLS LEAF; CORK; ONION; SKIN CELLS FROM CHEEK AND ARM What organelles are visible with the light microscope? How is each cell’s structure related to its function?

3. PLANT CELL LEAF CORK ONION What organelles do they have in common? What organelles are different? How are the similarities and differences in STRUCTURE related to the FUNCTION of these plant parts?

5. Elodea 100X There are 2 layers! Use fine adjustment to focus on just 1.

6. cell wall chloroplast cytoplasm Where is the cell membrane?

7. elodea 400X vacuole

8. ?

9. cyclosis

11. Onion 40X ?

12. Onion 100X

13. Onion 400X

14. BULB – fleshy leaves on a short stem Carbohydrate storage LEAF photosynthesis

15. Onion

16. CORK 400X CELL WALL

17. CORK 400X CELL WALL

18. Holes are empty Only cell wall remains Reminded Robert Hooke of small rooms or CELLS

19. ANIMAL CELL CHEEK CELLS SKIN CELLS How are the like each other? How different? How are they like the plant cells? How are they different from plant cells?

20. CHEEK CELLS unstained

21. CHEEK CELLS 40x

22. CHEEK CELLS 100x

23. CHEEK CELLS 400x

25. cytoplasm cell membrane nucleus

26. CHEEK CELLS 400x THESE CELLS ARE ALIVE

27. SORRY NO PHOTO FOR YOUR SKIN CELL SLIDE! Function: To cover and protect a surface These are dead cells – heavily keratinized (keratin is a protein) Like “floor tiles”

28. SEM OF SKIN CELLS

29. PROKARYTOTIC CELLS What organelles do they possess? Compare them to eukaryotes.

30. E. coli X1000 Staphlococcus aureus X400 unknown

31. DIAMETER TYPICAL PROKARYOTE 0.2-2.0 μm TYPICAL EUKARYTOE 10-100 μm

32. RIBOSOME Prokaryote – 20 nm Eukaryote – 25-30 nm MEMBRANE WIDTH 7-10 nm NUCLEUS DIAMETER 0.01 nm

35. LIES MY TEXT BOOK TOLD ME Are animal cells spheres? Are plant cells box-shaped? Are cells colorful? What determines the shape of any cell type?