Grass leaves curl Inwards during very dry weather. Select the most appropriate reason from the following
Closure of stomata
Flaccidity of bulliform cells
Shrinkage of alr spaces in spongy mesophyll
Tyloses in vessels
$T.S.$ of dicot leaf passing through the midrib is given below, certain parts have been indicated by alphabets. Choose the correct option
In monocotyledonous leaf.....
In leaves, the ground tissues consists of
In isobilateral leaf more plastids are found in
Describe internal structure of Dorsiventral (Dicotyledonous) leaf.