Closing of stomata can be both useful and harmful for a plant. What is the correct reason?
Answer and explanation
Correct answer: It reduces water loss but can also reduce carbon dioxide entry
Stomata are pores that regulate exchange between the leaf and the atmosphere. When they close, diffusion of water vapour out of the leaf decreases, which helps prevent excessive water loss during dry conditions. However, carbon dioxide also enters mainly through these pores, so closure can limit photosynthesis and food production. Thus option A correctly gives both effects; the other options describe unrelated or impossible functions.
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What is the correct answer to this question?
It reduces water loss but can also reduce carbon dioxide entry
Why is this the correct answer?
Stomata are pores that regulate exchange between the leaf and the atmosphere. When they close, diffusion of water vapour out of the leaf decreases, which helps prevent excessive water loss during dry conditions. However, carbon dioxide also enters mainly through these pores, so closure can limit photosynthesis and food production. Thus option A correctly gives both effects; the other options describe unrelated or impossible functions.
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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