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When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure of |
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a) |
Thick cuticle |
b) |
Large xylem cavities |
|
c) |
Parallel venation |
d) |
Bulliform cells |
|
When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure of |
|||
|
a) |
Thick cuticle |
b) |
Large xylem cavities |
|
c) |
Parallel venation |
d) |
Bulliform cells |
|
(d) The upper epidermises of monocots have large, thin walled and empty bulliform cells or motor cells containing water. These cells are mainly concerned with rolling and unrolling of leaf. The epidermis is cuticularized. |