A control group is different because it is not what is being tested. for example the control group would use sugar pills while the other group uses the pills being tested
In botany, a stoma is a pore, found in the leaf and stem epidermis that is used for gas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells which are responsible for regulating the size of the opening. Hope that helps you out. best way I can put it for ya!
