Question

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) Tyloses in vessels

Answer 1

it's 2) ..........hope it helps..

Answer 2

Answer:

"150)Second option is correct.

Explanation:

Grass leaves curl inwards during very dry weather because of the flaccidity of bulliform cells.

Water loss is the main cause of the curling. Bulliform cells become flaccid due to the water loss.

So, as a response to the stimuli, bulliform cells become flaccid and makes the leaves to curl inward to mimnimise the water loss and maintain the flow of water."