The cross-section of a leaf reveals its complex ... It moves by diffusion through small holes in the underside of the leaf called stomata. Guard cells control the size of the stomata so that ...

In this three week lab, students use the technique of making clear nail polish impressions of leaf stomata to generate and test an hypothesis of their choice about how leaf stomata density might vary ...

This document should fit on one page and should contain three sections: Introduction: two sentences in length and beginning with "We propose to investigate the effects of ....[describe the ...