(a) Explain how the leaf of a flowering plant is adapted for photosynthesis.

(b) Describe briefly the mode of feeding in tapeworm.

(c) Name one mineral element each needed for the proper functioning of :
(i) bones (ii) red blood cells
(iii) thyroid gland.

(d)(i) State three benefits of including roughages in the diet of humans.
(ii) State three reasons why proteins are important to humans.