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Question 80

What happens to a pair of guard cells, and to the pore between them, when they take in water and become turgid?

  1. They swell and curve apart, so the pore opensCorrect answer
  2. They swell and press together, so the pore closes
  3. They shrink, and the pore widens
  4. They keep their shape, and the cells around them open the pore

Explanation

Water entering a pair of guard cells makes them firm, and because their walls are thickened unevenly they bow outwards and leave a gap between them. Swelling that closed the pore would be the exact opposite of what firmness does here, and reversing the firm and the limp states is the standard mix-up in this part of the topic.

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Question 80: What happens to a pair of guard cells, and to the pore… · Plants and Photosynthesis · Questena