Why may a plant close stomata when transpiration is very high and water availability is low?
Answer and explanation
Correct answer: To reduce water loss
Stomata are pores controlled by guard cells that allow carbon dioxide entry but also permit water vapour to escape. When water availability is low, continued high transpiration can reduce cell water content and cause wilting. Closing the stomata limits diffusion of water vapour and conserves the remaining water, although it may also reduce carbon dioxide uptake and photosynthesis. Therefore option A is correct.
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What is the correct answer to this question?
To reduce water loss
Why is this the correct answer?
Stomata are pores controlled by guard cells that allow carbon dioxide entry but also permit water vapour to escape. When water availability is low, continued high transpiration can reduce cell water content and cause wilting. Closing the stomata limits diffusion of water vapour and conserves the remaining water, although it may also reduce carbon dioxide uptake and photosynthesis. Therefore option A is correct.
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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