When leaves bear flowers or inflorescences in their axils,they are called:

The expanded part of the leaf is called the .......

Which of the following two are the resultant of stipule modifications?
$I$. Spines in $Ziziphus$.
$II$. Tendrils in $Smilax$.
$III$. Tendrils in $Nepenthes$.
$IV$. Spines in $Argemone$.
$V$. Thorns in $Bougainvillea$.

$A$: Reticulate venation is observed in the leaves of sunflower.
$R$: Sunflower is included in the class Dicotyledonae.

The tongue-like outgrowth found in the leaf of grasses is known as:

The shape of guard cells in stomata in sugarcane plant is