(a) State two roles each of the following compounds in respiration: (i) glucose; (ii) oxygen. (b) List two types of cellular respiration (c) Name the struct...

(a)  State two roles each of the following compounds in respiration:
(i)   glucose;
(ii)  oxygen.                                              
(b) List two types of cellular respiration                                 
(c) Name the structures of gaseous exchange in the following organisms:

(d) Make a diagram, 6 cm to 8 cm long of an open stoma in a leaf and label fully.