Which of the following has the most primitive respiratory system?

(i) Make a labelled drawing of a typical plant cell to show its essential features.

(ii) Give the functions of two labelled organelles

(b) Describe briefly two levels of cell organization in living organisms giving an example of each type.

(c) What role do the following processes play in the activities of a living cell (i) osmosis; (ii) diffusion. 
 

(a) State four modes of nutrition in plants.

(b) Outline the process involved in the light and dark reactions of photosynthesis.

(c) Describe briefly the modifications and the mechanisms associated with the following feeding habits:
(i) filter feeding in mosquito larva; (ii) parasitic feeding in tapeworm.