stoma
guard cell or cells' celled guard cells that are found plants. the cell surface(epidermis) of the act only. for the exchange of gases and water vapor. when studied under a microscope. it can be seen that the guard cells to change shape' resulting in the hot weather and the crops in the state have the loss of water to it. (without any reason ) guard cells to close. to prevent evaporation of water from leaves. lt is trying to treat.