Give a step-by-step procedure for preparing a wet mount slide to view onion cells under a light microscope.

Sure, here is a step-by-step procedure for preparing a wet mount slide to view onion cells under a light microscope:

1. Gather your materials: You will need an onion, a knife, a microscope slide, a cover slip, a dropper, iodine solution, and a light microscope.

2. Cut a small piece of onion using the knife. Be careful not to cut yourself.

3. Peel off a thin layer of the onion. This will be your sample.

4. Place the onion layer on the microscope slide. Try to lay it flat to prevent it from folding or rolling up.

5. Add a drop or two of iodine solution to the onion layer. The iodine will help to stain the cells, making them easier to see under the microscope.

6. Carefully place the cover slip over the onion layer. To do this, hold the cover slip at an angle and slowly lower it onto the slide. This will help to prevent air bubbles from getting trapped under the cover slip.

7. Check the slide for air bubbles. If you see any, gently tap the cover slip to try to remove them.

8. Place the slide on the microscope stage and secure it with the stage clips.

9. Start with the lowest magnification on your microscope and focus on the onion cells. Once you have them in focus, you can increase the magnification for a closer look.

10. Observe the onion cells through the microscope. You should be able to see the cell walls, the nucleus, and possibly some other cell structures.

Remember to handle all materials with care and clean up your workspace when you're done.