Question

The number of stomata on the lower and upper surfaces of two leaves from plant species x and y were counted under the field of view of a light microscope. The results were as shown below.

Leaf	Number of stomata
	Upper surface	Lower surface
x	4	12
y	20	23

1. Which of the two leaves would be expected to have a lower rate of transpiration?
2. Give a reason for your answer in (1) above. 

Answer 1

1. X;
2. Has fewer stomata on both sides of the leaf than Y;