Multiple choice

When the guard cells are turgid

  1. the stoma is open

  2. the stoma is closed

  3. the stoma becomes flat

  4. it becomes a globe like structure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When guard cells become turgid due to water uptake, their uneven thickening causes them to bend outward, creating an opening between them. This is the open stomatal pore that allows gas exchange. When flaccid, the stomatal pore closes.

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