(a)[3]
Use label lines and the letters X, Y and Z to identify these features on Fig. 3.1. - X: a cell of the upper epidermis - Y: a palisade mesophyll cell - Z: a guard cell
(b)[4]
Describe and explain the route taken by water as it moves from inside the leaf at point Q on Fig. 3.1 to the atmosphere outside the leaf during transpiration.
(c)[3]
State three features of the leaf, visible in Fig. 3.1, which show that it has developed in a sunny position.