INSTRUCTIONS
Attempt all questions
1a) outline four functions of leaves in plant growth (04 marks)
b) show six ways in which plant leaves are modified for their function 906 marks)
2a) what is meant by essential nutrients? (01 mark)
b) state three conditions that a nutrient must satisfy to be regarded as essential (03 marks)
c) state three:
i) principle sources of nutrients to plants (03 marks)
ii) adaptations of plants to live in soils inherently deficient of nitrogen element (03 marks)
3a) differentiate between seed dormancy and seed viability (02 marks)
b)outline four adaptations of seeds for survival and reproduction (04 marks)
c) suggest four ways of ensuring high viability of seeds for planting (04 marks)
4a) outline five problems associated with nomadic and other local systems of animal rearing (08 marks)
b) suggest five interventions to improve the local systems of keeping live stock (05 marks)
5a) explain six factors that affect the transpiration rate in plants (06 marks)
b)suggest the importance of transpiration (04 marks)