Correct Answer: C. intelligence to control work

Correct Answer: A. insects

Correct Answer: B. receiving maize cobs to be shelled

Correct Answer: B. 39.0

Explanation

(a) (i) Temperature: (1) High temperature causes a reduction in feed intake low temperature encourages more feed intake. (2) High temperature reduces spermatogenesis and libido in males. (3) High temperature causes heat stress and reduced activity. (4) It may result in death of birds particularly chicks and layers. (5) It increases water intake in hot II weather and reduces water intake in cold weather. (6) It is necessary for incubation of eggs; (7) It lowers egg production. (8) Egg storage period is reduced under high temperature. (9) High temperature reduces hatchability.

(ii) Control of heat temperatures (1) introduce fans or air conditioners, (2) provide enough windows or opening for ventilation; (3) cover windows with cloth materials to conserve heat; (4) provide vents at the roof tops; (5) use poor conductors of heat for roofing sheet /sun reflecting sheets or paint roof white. Pens should also have ceiling boards under the roof; (6) use room heaters or lanterns to warm buildings when it is cold, (7) During construction orient open parts of buildings away from direct solar radiation (East-west direction)

(b) Relative Humidity (i) is very important in incubation. (ii) High humidity compounds heat stress. (iii) Low humidity induces rapid water loss from bird's body and thus increases their water intake. (iv) High humidity encourages the spread of diseases. (v) High humidity causes feed to go mouldy. Control of Humidity: (i) fixing humidifyers or open trays filled with water to increase humidity. (ii) Allowing free ventilation when the humidity is high. (iii) Avoidance of spilling of water in poultry houses to reduce humidity/dampness.

(c) Light: (i) Controls egg laying in hens. (ii) Duration of lighting controls time spent at feeding which regulates growth and the rate of feathering. (iii) Direct light of high intensity causes stress to the eyes_(iv) Bright light makes the birds active. (v) Light makes objects visible. Control of light: (i) In short daylight, provide extra illumination. (ii) A reasonable part of the walls should be made up of wire mesh or glass to promote lighting. (iii) Cover up windows with dark cloth to reduce light intensity.

Correct Answer: A. seed rate

Correct Answer: C. 4 - 5

Explanation

(a) The Gunter's chain consists of a brass handle at each end. The chain is entirely metallic. It consists of units, each of which is a straight piece and three oral rings. The commonest length available is 30.5m.

(b) Given Base length of farm 2km =200m, Perpendicular length = 1200m, Area of farm = 1/2(base x height) = 1/2(2000m x 1200m) = (24000000m²2) = 1200000m² or 1.2km² Alternatively: Base length of farm, = 2km Perpendicular length = 1200m, = 1.2km Area of farm = 1/2 (base x height) 1/2 (2km x 1.2km) 1/2 (2.4 km2) 1.2 km²

(c) Necessary precautions to be taken in order to eliminate errors when chaining farm land are: (i) pulling of taut chains, tapes or ropes. (ii) avoidance of errors of transposing figures on papers. (iii) equipment such as theodolite should be placed on a perfect horizontal plane. (iv). all chains, tapes, ropes, etc. must be properly alligned before taking measurement (v) avoidance of error of parallax when reading measurements. (v) make sure the chain is not faulty before use.

(d) Factors to be considered when choosing a garden site for a school include: (i) topography (ii) drainage (iii) availability of good top soil (iv) adequa water supply (v) closeness to the school (vi) good access road from the school to the garden.

Correct Answer: A. pulses

Correct Answer: D. liverfluke