Tissue Systems · NCERT Biology

Stomata are structures present in the epidermis of leaves. What is the primary function of the guard cells surrounding the stomatal pore?

  1. Synthesizing and storing reserve proteins
  2. Regulating the opening and closing of stomata
  3. Secreting chemicals that deter herbivores
  4. Conducting water and minerals to mesophyll
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Correct answer: Regulating the opening and closing of stomata

Guard cells are specialized epidermal cells that regulate the stomatal aperture. Changes in their turgidity open or close the pore, controlling gas exchange and transpiration.

Difficulty: Medium Question 2 of 20

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