Swollen lower end of leaf stalk is
Petiole
Pulvinus
Thalamus
Disc
$A$-Leaves originate from lateral meristem and arranged in an acropetal order
$R$- They are the most important vegetative organ for photosynthesis
Leaves become modified into spines in
How do the various leaf modifications help plants?
Generally, the parallel venation is found in
Phyllode is present in