What happens to stomata when water content in guard cells decreases?
Answer and explanation
Correct answer: They may close
Stomatal opening is controlled by the turgor pressure of the two guard cells. When they contain sufficient water, they become turgid and the pore generally opens; when water content decreases, they lose turgor and become flaccid. The pore can then close, limiting further water loss through transpiration. Thus option B is correct. Wider opening requires increased turgidity, while options C and D incorrectly assign unrelated functions to guard cells.
Frequently asked questions
What is the correct answer to this question?
They may close
Why is this the correct answer?
Stomatal opening is controlled by the turgor pressure of the two guard cells. When they contain sufficient water, they become turgid and the pore generally opens; when water content decreases, they lose turgor and become flaccid. The pore can then close, limiting further water loss through transpiration. Thus option B is correct. Wider opening requires increased turgidity, while options C and D incorrectly assign unrelated functions to guard cells.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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