Question

Guard cells are found in

• A. Stomata
• B. Hydathodes
• C. Both of the above
• D. None of the above

Answer 1

The correct option is A Stomata

Epidermis provides mechanical protection, allows gaseous exchange through stomata, restricts transpiration with cuticle, and is also involved in storage, photosynthesis, secretion, absorption and perception to stimuli. Stomata are pores, each guarded by two guard cells, which control the size of the pore.

Cells surrounding guard cells, but differing from other epidermal cells, are called subsidiary cells.

Guard cells are kidney shaped; their cell walls are thick on the inner surfaces. Guard cells contain many chloroplasts.