Stomatal Apparatus and Stomata Structure — NEET Biology

Which of the following statements regarding the stomatal apparatus and associated epidermal structures are NOT correct? S1: Stomata, crucial for transpiration and gaseous exchange, are exclusively found on the adaxial epidermis of dorsiventral leaves. S2: The inner walls of guard cells, which are towards the stomatal pore, are characteristically thinner and more elastic than their outer walls. S3: Subsidiary cells are specialized epidermal cells that are always present around guard cells, forming an indispensable part of the stomatal apparatus. S4: Guard cells, uniquely among epidermal cells, possess chloroplasts enabling them to regulate stomatal movement through turgor changes driven by photosynthesis. S5: In grasses (monocotyledons), the guard cells are distinctly dumb-bell shaped, whereas in most dicots they are bean-shaped. S6: The complete stomatal apparatus comprises the stomatal aperture, the guard cells, and any surrounding subsidiary cells, if present.