Agricultural Science Past Questions and Answers

(a) Define crop improvement. [2 marks]<br/>(b) Copy and complet the table below based on Mendel's Law of Indepen-dent Assortment of Genes (Dihybrid inheritance).<br/><table class='tbn'><tbody><tr><td> </td><td> TC </td><td> Tc </td><td> tC </td><td> tc </td></tr><tr><td> TC </td><td> TTCC </td><td> </td><td> </td><td> </td></tr><tr><td> Tc </td><td> </td><td> Ttcc </td><td> </td><td> </td></tr><tr><td> tC </td><td> </td><td> </td><td> </td><td> ttCc </td></tr><tr><td> tc </td><td> </td><td> </td><td> ttcC </td><td> </td></tr></tbody></table><br/><br/><br/>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]<br/>(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]<br/>(b) Give two reasons why oestrus detection is important in farm animals. [2 marks]<br/>(c) State four functions of each of the following hormones in farm animals. (i) androgen; (ii) oestrogen. [8 marks]<br/>(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]<br/>(b) State three reasons for carrying out each of the following animal husbandry practices; (i) culling of poultry; (ii) dehorning of cattle. [6 marks]<br/>(c) Mention the botanical names of four pasture legumes grown in West Africa [4 marks]<br/>(d) State four ways of preserving harvested fish [2 marks]

(a) Define: (i) demand; (ii) price elasticity of demand [4 marks]<br/>(b) Explain why the demand curve slopes downwards. [2 marks]<br/>(c) List four agents of agricultural marketing [4 marks]<br/>(d) State two advantages and one disadvantge of each of the following agricultural extension teaching methods; (i) newspapers; (ii) television [6 marks]

The most important contribution of agriculture to mankind is the provision of