Question

If the number of stomata is $30$ and epidermal cells are $120$ per unit area of a leaf, then the stomatal index is

Answer 1

Stomata index is the percentage which the number of stomata forms to the total number of epidermal cells, each stomata being counted as one cell. Stomatal index can be calculated by using the following equation.

I = S/E+S ×100

Where I= stomatal index

S= no of stomata per unit area

E=no of epidermal cells in the same unit area

So putting values in the above equation, we get

I=30/150×100

I=20