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

Open and Closed Stomata-01.jpg

So, the correct answer is (c)

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo