2. On the side you wish to census stomata (typically the leaf underside) paint a rather thick swath of clear nail polish. 3. After the nail polish has dried (several minutes), obtain a square of VERY ...

which left a kind of cast or impression of the leaf surface in the dried nail polish. When they looked at the impressions under a microscope, they counted the tiny mouth-shaped bumps, or stomata ...

In this lab, stomata density variation likely results from interacting environmental factors (e.g. CO 2, temperature, water, etc.); therefore, higher stomata density might be consistent with a student ...