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Guard lls regulate the opening and closing of stomata, thereby controlling transpiration in plants. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Guard cells regulate the opening and closing of stomata, thereby controlling transpiration in plants.
Ref: NCERT Class 11 Biology Chapter 6: Anatomy of Flowering Plants Anatomy of Dorsiventral and Isobilateral Leaf
Stomata are small openings on the leaf surface that regulate gaseous exchange and transpiration.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
When water flows into the guard cells, they swell, causing the stomatal pore to open. When they lose water, they shrink and the pore closes.
Ref: NCERT Text book class 10 Biology Chapter 5 life process
B fits best: Turgor pressure of guard cells. Keep the STOMATA MOVEMENT basics straight and Turgor pressure of guard cells stands out as the precise answer. Avoid: A) Osmotic pressure of epidermal cells; C) Capillary action; D) Diffusion pressure deficit. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
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