- A Lose water and become flaccid under osmotic stress
- B Are turgid (full of water)
- C Receive consistently reduced light intensity
- D Receive an ABA stress signal during drought
Correct answer: B. Are turgid (full of water)
Explanation: Guard cells become turgid (fill with water) when K+ enters them. Turgor pressure causes stomata to open.
Concept context
Water and mineral absorption, the ascent of sap, transpiration, and phloem transport via the pressure flow hypothesis.