(a) Explain the term animal nutrition, [2 marks]
(b) State four functions of oestrogen in animal reproduction [4 marks]
(c) Explain each of the following methods of animal improvement: (i) selection: (ii) breeding; (iii) introduction [6 marks]
(d) What are ornamental plants? [2 marks]
(e) State four vegetative methods that could be used to propagate ornamental plants. [4 marks]
Explanation
(a) Explanation of animal nutrition: Animal nutrition refers to the art and science of feeding farm animals.
(b) Functions of oestrogen in animal reproduction:
– Stimulates the development of mammary gland.
– Influences the development of female secondary sexual characteristics.
– Determines the onset of heat.
– Promotes the production of ova/controls ovulation.
– Increases cilliary activity and mucous secretion in the oviduct.
– Increases blood supply and water content of the uterus.
(c) Explanation of methods of animal i▪ mprovement:
(i) Selection: This is the process of picking/choosing one or more animals with desired qualities from a group/population for breeding purposes.
(ii) Breeding: This is the mating of animals of the same species with the aim of transferring desirable qualities from parents to offspring.
(iii) Introduction: This involves bringinging exotic breeds of animals with desired qualities into a new environment.
(d) Meaning of ornamental plants: Ornamental plants are plants that are grown for the aesthetic values of their flowers, leaves, shapes etc /They are plants grown to beautify the environment.
(e) Vegetative methods that could be used to propagate ornamental plants:
– Cutting
– Budding
-Layering
– Grafting
– Marcotting