Question

In each of the following situations what happens to the rate of photosynthesis?

(a) No rainfall in the area

(b) Stomata get blocked due to dust

(4 Marks)

Answer 1

(a) The rate of photosynthesis decreases when no rainfall is occurring in the area due to a lack of water (water helps in the opening and closing of stomata which is required for the gaseous exchange).
(2 Marks)

(b) The rate of photosynthesis decreases when stomata get blocked due to dust as it obstructs the gaseous exchange.
(2 Marks)