SSC MTS EXAM

Detailed explanation-1: -Guard cells regulate the opening and closing of stomatal holes, which are controlled by the process called osmosis. The entry of water into the stomata makes guard cells swell which leads to the opening of the stomata. The stomata close when the guard cells lose water and constrict, becoming flaccid and straight.

Detailed explanation-2: -They are produced in pairs with a gap between them that forms a stomatal pore. The stomatal pores are largest when water is freely available and the guard cells turgid, and closed when water availability is critically low and the guard cells become flaccid.

Detailed explanation-3: -Upon the incoming of water inside the guard cells, they swell up to become like a curved banana surface, due to which the stomatal pore opens up. When the guard cells lose water, they become flaccid and straight and thus, close the stomatal aperture.