(a) Define crop improvement. [2 marks]

(b) Copy and complet the table below based on Mendel's Law of Indepen-dent Assortment of Genes (Dihybrid inheritance).

Use the following information: T = Tall; C = Coloured; t = Dwarf; c = White. (Where T and C are dominant character; while t and c are recessive TC TTCC characters) [6 marks]

(c) Calculate the percentage of plants in (b) above that are: (i) Tall coloured; (ii) Tall white; (iii) Dwarf coloured; (iv) Dwarf Tc Ttcc white [8 marks] 

(a) Name four breeds of rabbits. [2 marks]

(b) Give two reasons why oestrus detection is important in farm animals. [2 marks]

(c) State four functions of each of the following hormones in farm animals. (i) androgen; (ii) oestrogen. [8 marks]

(d)(i) List two viral diseases of poultry. (ii) List two ecto-parasites of poultry [4 marks] 

 (a) List four methods of identification in cattle production [4 marks]

(b) State three reasons for carrying out each of the following animal husbandry practices; (i) culling of poultry; (ii) dehorning of cattle. [6 marks]

(c) Mention the botanical names of four pasture legumes grown in West Africa [4 marks]

(d) State four ways of preserving harvested fish [2 marks] 

(a) Define: (i) demand; (ii) price elasticity of demand [4 marks]

(b) Explain why the demand curve slopes downwards. [2 marks]

(c) List four agents of agricultural marketing [4 marks]

(d) State two advantages and one disadvantge of each of the following agricultural extension teaching methods; (i) newspapers; (ii) television [6 marks] 

(a) List four factors that cause a change in supply of agricultural produce [4 marks]

(b) Distinguish between fixed cost and variable cost giving two examples in each case [6 marks]

(c) Example the following agricultural extension teaching methods: (i) posters; (ii) field trips. [6 marks]