Agriculture Paper 2 Pre Mock Questions and Answers - Mokasa I Joint Examination July 2021

INSTRUCTIONS TO CANDIDATES

1. Write your name and index number in the spaces provided above.
2. Sign and write the date of examination in the spaces provided above.
3. This paper consists of three sections A, B and C.
4. Answer all questions in Section A and B
5. Answer any two questions from Section C
6. Answer to ALL questions MUST be written in this booklet.

QUESTIONS

SECTION A: (30 MARKS)
Answer ALL questions in this section in the spaces provided.

1. State two importance of good ventilation in animal houses. (1 mark)
2. Outline four factors that affect the digestibility of a feed (2 marks)
3. List four signs that shows a rabbit doe is about to give birth (2 marks)
4. Explain the meaning of the following terms used in livestock production (2 marks)
   1. Chick
   2. Gilt
   3. Heterosis
   4. Kindling
5. Give four maintenance measures for a crosscut saw. (2 marks)
6. Name two tools used for checking the verticalness of a wall when laying bricks during construction. (1 mark)
7. Give four reasons why a farmer should use concrete floors for dairy sheds. (2 marks)
8. State the origins of the following breeds of livestock (2 marks)
   1. Charolais
   2. Toggenburg
   3. Merino
   4. Landrace
9. Give four ways in which diseases can spread from one animal to other within the farm.(2 marks)
10. Give four limitations of artificial insemination in cattle breeding (2 marks)
11. State four functions of carbohydrate in the body of an animal (2 marks)
12. Name two forms of which tapeworms are found in livestock (1 mark)
13. Name six routine livestock rearing practices used to control parasites and diseases (3 marks)
14. Outline four factors that influence the quality of honey (2 marks)
15. State four ways in which animal utilizes a production ration (2 marks)
16. Mention four reasons for treating timber before roofing farm buildings (2 marks)

SECTION B: (20 MARKS)
Answer ALL the questions in this section in the spaces provided.

17. Below is an illustration of a farm equipment.
    
    
    1. Identify the equipment (1 mark)
    2. State the use of the equipment (1 mark)
    3. State three methods that can be used to sterilize the equipment (3 marks)
18. A farmer wanted to mix 100kg of livestock feed containing 30% digestible crude protein (DCP) by using sorghum containing 12% digestible crude protein (DCP) and soya bean meal containing 37% digestible crude protein (DCP). Calculate the quantities of each feedstuff the farmer would have in the ration. (5 marks)
19. The diagram below shows the reproductive system of a cow. Study it carefully and answer the questions that follow.
    
    
    1. Name the parts labeled F and H (2 marks)
    2. Give two functions of the part labeled G (2 marks)
    3. Give the role of the part labeled J (1 mark)
20. The diagram below shows a farm structure. Use it to answer the questions that follow.
    
    
    1. Identify the practice being carried out. (1 mark)
    2. Name the structure in which the practice is being carried out. (1 mark)
    3. Give three advantages of the structure above over a plunge dip. (3 marks)

SECTION C:
Answer any TWO questions from this section in the spaces provided.

21.                                                   
    1. Describe East Coast Fever (ECF) disease under the following sub-headings;
       1. Causative organism (1 mark)
       2. Animals affected (1 mark)
       3. Symptoms (6 marks)
       4. Control (2 marks)
    2. Explain six advantages of embryo transplant in livestock production (6 marks)
    3. State four functions of worker bees in a hive (4 marks)
22.                              
    1. Describe the body confirmation features of a dairy heifer. (5 marks)
    2.  Explain the uses of five various hand tools in the construction of a Kenya Top Bar hive (KTBH) (10 marks)
    3. Explain the factors that determine the amount of feed that an animal consumes (5 marks)
23.                    
    1. Explain five factors considered when selecting livestock for breeding (10 marks)
    2. State five effects of fleas on livestock (5 marks)
    3. Explain five factors considered when siting a fish pond. (5 marks)

MARKING SCHEME

1. Importance of good ventilation in animal houses.
   1. To have sufficient air circulation
   2. To regulate humidity inside the house
   3. To help regulate temperature inside the house(2 x ½m = 1 mark)
2. Factors that affect the digestibility of a feed.
   1. Chemical composition of the feed
   2. Form in which the food is given/method of preparation
   3. Species of the animal
   4. The ratio of energy/carbohydrate to the proteins
   5. Feed mixtures and other ingredients in the feed
   6. Quantity of feed already present in the digestive system of the animal(4 x ½ = 2 marks)
3. Signs that shows a rabbit doe is about to give birth
   1. Nest building
   2. Plucking of fur from her abdomen
   3. Restlessness
   4. Large/congested udder
   5. Loss of appetite
4. Meaning of the following terms
   1. Chick – Newly hatched bird from one day to eight weeks old (½ mark)
   2. Gilt – A young female pig from weaning to farrowing (½ mark)
   3. Heterosis – Increased ability and performance of the offsprings above the average of two of unrelated parents (½ mark)
   4. Kindling – Act of giving birth/parturition in rabbits. (½ mark)
5. Maintenance measures for a cross-cut saw (2 marks)
   1. Clean after use
   2. Set the teeth to the right angle
   3.  Sharpen the teeth if blunt
   4. Replace broken handles
   5. Tighten loose screws (4 x ½ = 2 marks)
6. Tools used for checking verticalness of a wall when laying bricks.
   1. Spirit level
   2. Plumb bob/plumbline(2 x ½m = 1 mark)
7. Four reasons why a farmer should use concrete floors for dairy shed.
   1. Easy to clean
   2. Long lasting
   3. Do not encourage foot rot
   4. Aid in controlling parasites
   5. Help to prevent waterlogging
   6. Allow easy drainage of urine(4 x ½m = 2 marks)
8. Origin of the following breeds;
   1. Charolais - France (½ mark)
   2. Toggenburg - Switzerland (½ mark)
   3. Merino - Spain (½ mark)
   4. Landrace - Denmark (½ mark)
9. Four ways in which diseases can spread
   1. Through vectors
   2. Through eating contaminated food
   3. Through breeding/mating
   4. Through breathing in contaminated air
   5. Through surgical instruments
   6. Through sucking of young ones(4 x ½m = 2 marks)
10. Limitation of artificial insemination in cattle breeding (2 marks)
    1. Harmful traits/diseases can be spread faster
    2. It requires trained personnel
    3. There are low chances of conceptions due to death of sperm
    4. Requires more labour than natural mating(4 x ½m = 2 marks)
11. Functions of carbohydrates in the body of an animal.
    1. Supply of energy to carry out body processes
    2. Provide raw materials for the synthesis of animal products such as milk, meat and eggs.
    3. They aid in peristalsis
    4. Excess carbohydrates are converted to fat and stored under the skin providing insulation to the body.(4 x ½m = 2 marks)
12. Forms of which tapeworms are found in livestock (1 mark)
    1. Embryo/infective egg
    2. Cysts/bladderworms/cysticercus/larva(2 x ½m = 1 mark)
13. Routine livestock rearing practices used to control parasites and diseases.
    1. Vaccination
    2. Deworming
    3. Hoof trimming
    4. Docking
    5. Dipping/spraying
    6. Dusting(4 x ½m = 2 marks)
14. Factors that influence the quality of honey
    1. Presence of impurities/foreign materials
    2. Source of nectar/type of flower
    3. The stage of ripening/maturity
    4. The method of extraction/honey harvesting
    5. Season of the year
    6. Rate of smoking(4 x ½m = 2 marks)
15. Four ways in which animal utilizes a production ration. (2 marks)
    1. For synthesis of products such as milk and meat/for fattening
    2. For reproduction/foetal development/mating
    3. For growth in young animals
    4. For daily work/activities like ploughing and pulling carts(4 x ½m = 2 marks)
16. Four reasons for treating timber
    1. Prevent attack from insects
    2. Prevent attack from fungi/rotting
    3. To resist weather conditions e.g. extreme temperature
    4. To resist water penetration
    5. To harden the wood/make it durable/increase strength

SECTION B: (20 marks)

17.                              
    1. Identify the equipment
       • Milk can/milk churn
    2. State the use of the equipment
       • Keeping milk/carrying milk
    3. State three methods that can be use to sterilize the equipment
       1. Using sunlight
       2. Steam the equipment/use hot water treatment
       3. Use chemical sterilizers e.g biocide.
18.     (5 marks)
    
    Sorghum = 7 x 100kg = 28kg√
                    25
    Soya beans = 18 x 100kg = 72kg √
                         25 
19.                              
    1.                      
       • F – cervix (1 mark)
       • H – Oviduct/fallopian tube
    2.                        
       1. Produce ova/ female gametes
       2. Produce hormones that control ovulation and pregnancy.
20.                    
    1. Identify the practice being carried out.
       Spraying/tick control
    2. Name the structure in which the practice is being carried out.
       Spray race.
    3. Give three advantages of the structure above over a plunge dip
       • Suitable for pregnant and sick animals as they do not get shock.
       • It is economical-the acaricide wash is not wasted since it is re-cycled in the process. It also requires a small amount of acaricide wash.
       • Animals cannot swallow the acaricide wash ie no poisoning of animals.
       • Spraying is faster ie can spray more animals per hour than a plunge dip since animals walk through the spray race.
       • Less labour is required
       • Small stock eg sheep can easily be sprayed.