There are two guard cells on each stomate. They can open and close the pathway.
an opening.
It's actually the guard cells. Water vapor does go through it, though.
Stomata for plural, and stoma for singular... Stoma/stomata is a guard cell and it also serves as an opening. source: Biology class... ^^,
Stoma or stomata
Stoma (or plural form stomata for a number of stoma)
stoma
The stoma (stomata)
The stoma opens and closes to allow gas exchange. The Guard cells are located around the stoma and regulate the opening and closing of the stoma.
a guard cell.
The answer for this question is the Stomata. Though if it is singular it is the Stoma.
the function of guard cells are that they control the opening and closing of the stoma