The opening and closing of the stomatal pore depends upon

(A) oxygen

(B) temperature

(C) water in guard cells

(D) concentration of CO 2 in stomata



Stomata are pore-like structures present on the surface of leaves which help in the exchange of gases and transpiration.


  • The opening or closing of stomata depends on the water in guard cells.
  • When there is water inside the guard cells, they become swollen and the stomata is open.
  • When the guard cells lose water, they become shrunken the stomata closes


So, the correct answer is (c)

  1. Class 10
  2. Chapter 6 Class 10 - Life Processes (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo