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Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:

1. Closure of stomata
2. Flaccidity of bulliform cells
3. Shrinkage of air spaces in spongy mesophyll
4. Ty loses in vessels

Correct answer: Flaccidity of bulliform cells

Solution

Bulliform cells are large, thin-walled cells in grass leaves that can change shape in response to changes in water availability, causing the leaves to curl inwards.

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