Put a small drop of water on a microscope slide. Hold the leaf with the surface you want to examine uppermost. Tear the leaf obliquely (in a slanted way) so as to reveal part of the epidermis.

(Figure 1) Emergence is the first vegetative stage, labeled as VE when the corn plant may still have a cylindrical shape and lacks full leaf formation. This stage can be easy to miss, as the initial ...

This allows it to convert carbon dioxide and water into glucose. This glucose is: After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.