a.Complete the table below

Element	Function in plants	Effect of deficiency in plants
Iron
Molybdenum
potassium
copper
nitrogen

b.Name three classes of organic foods which are essential constituents in the diet of a mammal.

c.State two roles each of the following structures of the digestive system in humans:
 i.buccal cavity   ii, duodenum iii.stomach

d. Name the end product of adding dilute hydrochloric acid to sucrose