PROBLEM: What are the differences between animal and plant cells?

PREDICTION:  

MATERIALS: MICROSCOPES, food coloring, 3 unknown samples

PROCEDURE: First examine a plant cell (onion) and an animal cell. Your instructor will give you a small piece of onion skin. Put a drop of food coloring on the onion, and observe. Draw both the animal and plant cell.

Describe the major difference between plant and animal cells.

Now look at the 3 unknown samples. Draw what you see. Determine whether they come from an animal or a plant.

CONCLUSION: How can you distinguish a plant cell from an animal cell?