The shape of guard cells in stomata in sugarcane plant is
a)	Dumb bell-shaped	b)	Bean shaped	c)	Horse shoe shaped	d)	Irregular shaped

(a)

In the majority of the plants, the shape of guard cells in stomatal apparatus are kidney-shaped in outline, which are joined at their ends. In the members of Cyperaceae and Poacease, the shape of guard cells is dump-bell shaped in outline. Their middle portion are thick walled, while expanded ends are thin walled