The cuticle is thickest on the upper surface of the leaf and contains waxy materials to make it water proof in order to reduce water loss by evaporation.
(The cuticle; is; thickest on the upper surface of the leaf) (The cuticle; contains; waxy materials to make it water proof in order)
The cuticle The cuticle
is contains
thickest on the upper surface of the leaf
waxy materials to make it water proof in order