Subject: Stomates

Two of my 7th grade students are studying the effects on plants of 
pollution blocking of stomates.  To view stomates, they applied nail 
polish to the bottom of a leaf, and, when dry, pealed off the leaf 
layer with scotch tape and looked at the tape under 400x magnification 
in the microscope.  They clearly were able to see the stomates, some 
open, others closed.  They then looked at the slide several minutes 
later, and said that they thought that a higher percent of the 
stomates were now closed.  Do you think it would be possible for 
stomates to close in this condition?

Thanks for listening.
Susan Herzog

Re: Stomates