1. Sample Pictures Available at http://biology2020.wikispaces.com/
Image J
Sample Pictures Available at

2. Onion
Find your file and open it.

3. Select the straight line tool. Drag across your field of view.

4. Under analyze: Set scale

5. Pixels are already there. Enter your known distance.

6. Trace a cell wall with the free hand tool (before).

7. Go to analyze: Measure

8. Analyze: Set Measurements

10. Measure DNA Distance

11. Leaf Surface Area

12. Compare Stomata per surface area
Oak 400X
Rose 400X

13. Choose the Multi point tool (right click)

14. Click to number (21 in the field of view)

15. Area of FOV= 0.145mm2 (from Image J) Verify ?
Diameter= 0.45 mm
Radius= mm
Area of FOV= 0.145mm2 (from Image J)
Verify ?
Pi r squared