Biology Practical

• Plant Cells-Making a Slide

  1. Peel a thin, transparent layer of epidermal cells from the inside of an onion.
  2. Place cells on a microscope slide.
  3. Add a drop of water or iodine (a chemical stain).
  4. Lower a coverslip onto the onion cells using forceps-gently to prevent trapping air bubbles.
• Animal Cells-Making Slides

  1. Remove cells from the inside of your cheek using a cotton bud.
  2. Smear the cotton bud onto a microscope slide.
  3. Add a drop of methylene blue (a chemical stain).
  4. Lower a coverslip onto the cheek cells using forceps or a mounted needle-gently to prevent trapping air bubbles.