STUDY OF CHEEK CELLS: Follow the instructions below to examine epithelial cells obtained from the inner lining of  your cheek. First, try to determine something of their structure by adjusting the diaphragm and  A. Cut an onion in to quarters B. Remove one of the fleshy “scale” leaves C. Snapping the “leaf” backward usually produces a ragged piece  epidermis.  D. Remove a small piece of epidermis and spread it smoothly in a drop of  water on a slide E. Gently lower a cover slip to prevent trapping air bubbles. Examine with your microscope. Add more water to the edge  of the coversliop with an eyedropper if the slides begins to dry.  F. Add one or two drops of methylene blue or  Janus Green stain to the edge of the cover  slip. G. Drew the stain under by touching absorbent paper to the opposite side of the cover slip.