Danho
ZIMSEC O Level · 4001/2 · N2019

Agriculture Paper 2 November 2019

Questions
68
Total marks
180
Syllabus code
4001/2

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Questions
68
Pass mark
41
Sit this paper

Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 101

[2 marks]Land as natural heritage, timber treatment and wood types
Land is described as a natural heritage. Which statement best supports that description?
  1. AIt can be bought at any time from a shop as soon as a farmer has the money
  2. BIt is created afresh each season by the rains that fall on a district
  3. CIt belongs only to the person who happens to be farming it this year
  4. DIt is passed from one generation to the next and cannot be manufactured

Question 102

[2 marks]Land as natural heritage, timber treatment and wood types
Which set shows the value of land to a Zimbabwean farming community?
  1. AIt matters only to the tourist industry and to the wildlife it carries
  2. BIt grows crops and grazing, holds minerals and carries water sources
  3. CIt grows crops only, and has no value beyond the maize that it yields
  4. DIt is useful only where a title deed has been issued over the ground

Question 103

[2 marks]Land as natural heritage, timber treatment and wood types
Freshly cut poles are stacked off the ground in a shady, airy place for several weeks so that they dry slowly before being treated. Name this process.

Answer this when you sit the paper.

Question 104

[2 marks]Land as natural heritage, timber treatment and wood types
Why are wooden fencing poles treated with a preservative before they are put into the ground?
  1. AUntreated poles will not take barbed wire because the bark is too smooth
  2. BUntreated wood is destroyed by termites and by fungal rot below ground
  3. CTreatment makes the poles a great deal heavier so that they stand firm
  4. DTreatment makes the wood softer so that staples are easier to drive in

Question 105

[2 marks]Land as natural heritage, timber treatment and wood types
How does an indigenous hardwood such as mukwa differ from an exotic softwood such as pine?
  1. AThe hardwood grows slowly and gives dense durable timber, the softwood grows fast
  2. BThe hardwood grows fast and gives light timber, the softwood is very slow to grow
  3. CThe hardwood is planted in blocks by growers, the softwood only grows in the wild
  4. DThe hardwood gives timber only for firewood, the softwood is used for furniture

Question 201

[2 marks]Irrigation water, soil structure and soil water
Which pair are the usual sources of irrigation water on a Zimbabwean farm?
  1. AA rain gauge and the roof gutter of the farm implement shed
  2. BA watering can and the tank used for mixing the dip wash
  3. CThe morning dew on the leaves and the mist in the vlei bottom
  4. DA farm dam and a borehole sunk into the underground water

Question 202

[3 marks]Irrigation water, soil structure and soil water
Which set of practices improves the structure of a cultivated soil?
  1. ALeaving the land bare over the dry season and raising the stocking rate
  2. BAdding well rotted manure, growing a cover crop and liming an acid soil
  3. CPloughing the land while it is wet and burning the crop residues each year
  4. DGrazing the stubble bare with cattle and working the land with heavy discs

Question 203

[3 marks]Irrigation water, soil structure and soil water
Why is soil water important to a growing crop?
  1. AIt keeps the soil cold so that the roots grow much deeper into the ground
  2. BIt is the only source of the nitrogen the crop uses to build its protein
  3. CIt fills the pores completely so that no air is left anywhere in the soil
  4. DIt dissolves the nutrients so that roots can take them up and move them

Question 204

[2 marks]Irrigation water, soil structure and soil water
How does gravitational water differ from capillary water in a soil?
  1. AGravitational water rises up the plant stem, capillary water sits on the surface of leaves
  2. BGravitational water drains out of the large pores, capillary water is held in the fine pores
  3. CGravitational water is held in the fine pores, capillary water simply runs off the soil surface
  4. DGravitational water is the vapour in the pores, capillary water is the ice formed at night

Question 301

[3 marks]Contour ridges and irrigation systems
How does a contour ridge reduce soil erosion on arable land?
  1. AIt breaks the slope and leads runoff away slowly to a protected outlet
  2. BIt soaks up all the rain that falls on the field so that none runs off
  3. CIt raises the crop above the water so that the roots are never flooded
  4. DIt marks the boundary of the field so that cattle cannot walk over it

Question 302

[2 marks]Contour ridges and irrigation systems
Along what line is a contour ridge pegged out on a hillside?
  1. AAcross the slope, along points of equal height, with a slight fall to the outlet
  2. BStraight up and down the slope, so that the water leaves the field extremely quickly
  3. CAlong the edge of the field nearest the road, whatever the slope of the land is
  4. DIn a circle around the highest point of the field, at a steep grade all the way

Question 303

[3 marks]Contour ridges and irrigation systems
Which set of factors decides which irrigation system a farmer installs?
  1. AThe breed of cattle kept on the farm and the size of the grain store built
  2. BThe water available, the slope and soil of the land, the crop and the capital
  3. CThe colour of the pipes, the name of the supplier and the age of the farmer
  4. DThe distance to the nearest school and the number of workers living on the farm

Question 401

[3 marks]Asexual propagation, weeds and biological pest control
Which is an advantage of propagating a fruit crop asexually rather than from seed?
  1. AThe new plants live for many more years than any plant grown from a seed
  2. BThe new plants are identical to the parent, so the desired quality is kept
  3. CThe new plants have deeper tap roots than any plant raised from seed can have
  4. DThe new plants can be planted at any time because they never need watering

Question 402

[1 marks]Asexual propagation, weeds and biological pest control
A farmer plants pieces of mature sugar cane stem carrying buds, and each piece grows into a new plant. Name this type of propagation.

Answer this when you sit the paper.

Question 403

[3 marks]Asexual propagation, weeds and biological pest control
Weeds are usually treated as a problem, but they also bring some benefit. Which statement describes a genuine benefit of weeds?
  1. AThey cover bare soil against erosion and add organic matter when ploughed in
  2. BThey add nitrogen to the soil faster than any legume crop a farmer could grow
  3. CThey keep insect pests off the crop by making the whole field smell different
  4. DThey raise the yield of the crop growing beside them by shading its own roots

Question 404

[3 marks]Asexual propagation, weeds and biological pest control
A farmer releases predatory insects to control aphids instead of spraying. What is the fair assessment of that method?
  1. AIt works only in a greenhouse and can never be used in an open field crop
  2. BIt is far more expensive than spraying and has to be repeated every single fortnight
  3. CIt leaves no residue and lasts, but it reduces the pest rather than wiping it out
  4. DIt removes every last aphid within a day and needs no further attention at all

Question 501

[2 marks]Fencing tools, irrigation pump maintenance and soil moisture terms
Name the tool used to pull a fencing wire tight between two straining posts before it is stapled.

Answer this when you sit the paper.

Question 502

[2 marks]Fencing tools, irrigation pump maintenance and soil moisture terms
Which set of tasks is part of the routine maintenance of a farm irrigation pump?
  1. ARepaint the pump housing weekly and replace the whole impeller each month
  2. BRun the pump dry for an hour each week so that the seals are dried out
  3. CRemove the foot valve so the pump can draw water more freely from the dam
  4. DCheck the oil, grease the bearings, clean the strainer and look for leaks

Question 503

[3 marks]Fencing tools, irrigation pump maintenance and soil moisture terms
In what order are the operations carried out when wooden fencing posts are being treated on a farm?
  1. ASeason the poles, then remove the bark and put them straight into the fence line
  2. BRemove the bark, cut to length, season the poles, then soak them in preservative
  3. CSoak the poles in preservative, then remove the bark and cut them to length last
  4. DCut to length, plant the poles in the ground, then paint preservative onto them

Question 504

[2 marks]Fencing tools, irrigation pump maintenance and soil moisture terms
How does soil at field capacity differ from soil holding only hygroscopic moisture?
  1. AAt field capacity the soil holds only air, hygroscopic moisture fills all the pores
  2. BAt field capacity the soil is bone dry, hygroscopic moisture is water in the leaves
  3. CAt field capacity the crop can still draw water, hygroscopic moisture it cannot use
  4. DAt field capacity the soil is waterlogged, hygroscopic moisture means it is flooded

Question 601

[2 marks]Agricultural cooperatives, decision making and farm budgeting
Membership of an agricultural cooperative in Zimbabwe is described as voluntary and open. What does that mean?
  1. AAnyone able to use the service may join, and no one is forced to remain a member
  2. BAnyone may join but no member is ever allowed to leave once they have joined
  3. COnly farmers holding more than ten hectares of land are allowed to become members
  4. DMembership is decided each year by the government officer for the whole district

Question 602

[2 marks]Agricultural cooperatives, decision making and farm budgeting
Why do cooperatives set aside part of each year's surplus for member education and training?
  1. ATraining is the only way in which a cooperative may spend any part of its surplus
  2. BIt reduces the amount of tax the individual members have to pay on their farms
  3. CMembers who understand the society's accounts and rules can control it properly
  4. DThe law requires the money to be paid to the district administrator each year

Question 603

[3 marks]Agricultural cooperatives, decision making and farm budgeting
Which sequence of steps does a farmer follow when making a management decision?
  1. AGather facts, act at once, then decide what the problem was and weigh choices
  2. BWeigh the alternatives, review the outcome, then gather facts and act on them
  3. CDefine the problem, gather facts, weigh the alternatives, decide, act and review
  4. DAct at once, then define the problem, then gather the facts and review the decision

Question 604

[2 marks]Agricultural cooperatives, decision making and farm budgeting
Why does a farmer draw up a budget before the season starts?
  1. AIt is the document that proves ownership of the land to the district office
  2. BIt shows the income and costs expected, so enterprises can be compared beforehand
  3. CIt records exactly what was actually spent during the season that has now just ended
  4. DIt fixes the price the buyer will have to pay for the crop when it is harvested

Question 701

[2 marks]Horticulture branches, pruning and planting holes
Name the branch of horticulture that deals with the growing of vegetables.

Answer this when you sit the paper.

Question 702

[3 marks]Horticulture branches, pruning and planting holes
A grower runs an orchard of oranges, mangoes and avocados for the fresh market. Which branch of horticulture is being practised?
  1. AFloriculture, which is the growing of flowers and ornamental potted plants
  2. BSilviculture, which is the growing of timber trees in plantations for poles
  3. CPomology, which is the growing of fruit crops for sale or for processing
  4. DOlericulture, which is the growing of leafy and root vegetables for market

Question 703

[3 marks]Horticulture branches, pruning and planting holes
A Zimbabwean farm grows roses under greenhouses and air freights the blooms to Europe. Which branch of horticulture is that?
  1. AFloriculture, the growing of flowers and ornamental plants for sale
  2. BPomology, the growing of tree fruits such as citrus and deciduous fruit
  3. COlericulture, the growing of tomatoes, cabbages and other vegetables
  4. DLandscape horticulture, the design and upkeep of gardens and grounds

Question 704

[3 marks]Horticulture branches, pruning and planting holes
Why is a deciduous fruit tree such as an apple or a peach pruned every winter?
  1. ATo keep the tree dormant for an extra month so that it flowers much later
  2. BTo open the canopy to light and air and keep the tree in a workable shape
  3. CTo make the tree grow as tall as possible so that it carries far more fruit
  4. DTo remove all of the previous season's growth so that only old wood is left

Question 705

[2 marks]Horticulture branches, pruning and planting holes
Which wood is cut out first when a deciduous fruit tree is pruned?
  1. AThe strongest and best placed young shoots, because they will crowd the tree later
  2. BThe main trunk is shortened first so that the whole tree is brought down in height
  3. CAll the branches on the sunny side, so that the shaded side can catch up in growth
  4. DDead, diseased, damaged and crossing branches are taken out before anything else

Question 706

[2 marks]Horticulture branches, pruning and planting holes
Why is a fruit tree pruned to carry fewer fruits than it would set on its own?
  1. AA lighter crop of larger fruit sells for more and does not break the branches
  2. BThe tree cannot flower at all in the season after it has carried a full crop
  3. CFruit left on the tree draws the water away from the roots and dries them out
  4. DBuyers in Zimbabwe will not accept a tree that has carried more than ten fruit

Question 707

[3 marks]Horticulture branches, pruning and planting holes
How is a planting hole prepared for a young mango tree?
  1. ADig a shallow scrape just wide enough to take the roots, and plant straight away
  2. BDig the hole on the day of planting and fill it with fresh green kraal manure
  3. CDig the hole and leave it open through the whole of the following wet season
  4. DDig about a metre across and deep, keeping the topsoil and the subsoil apart

Question 708

[2 marks]Horticulture branches, pruning and planting holes
What is mixed with the topsoil that is returned to a fruit tree planting hole?
  1. AA heavy dressing of ammonium nitrate to push the young tree along
  2. BCoarse gravel and stones so that the water drains away very quickly
  3. CFresh green grass cuttings so that the hole stays warm through winter
  4. DWell rotted manure or compost together with a phosphate fertiliser

Question 801

[3 marks]Cereal crop management and legume storage
A maize crop has emerged and shows gaps where seed failed. When should the farmer fill those gaps?
  1. AAt tasselling, when the gaps in the stand can be seen most clearly from the road
  2. BJust before harvest, so that the replacement plants are not eaten by any birds
  3. CIn the following season, since a gap filled now will never catch up in any case
  4. DWithin about the first week or two of emergence, while the crop is still even

Question 802

[3 marks]Cereal crop management and legume storage
A maize crop on a sandy soil is to be top dressed with ammonium nitrate. How is the dressing best given?
  1. AGive the whole amount at planting so the crop has it available from the start
  2. BGive the whole amount once the cobs have already been filled with grain
  3. CBroadcast it over the standing crop on the wettest day of the whole season
  4. DSplit it, giving part at about knee height and the rest a few weeks later

Question 803

[2 marks]Cereal crop management and legume storage
During which period does weed competition cost a maize crop the most yield?
  1. AThe dry season after harvest, when the land is standing in stubble
  2. BThe week of planting, before the crop or the weeds have germinated
  3. CThe first six weeks after emergence, while the crop is small and open
  4. DThe last three weeks before harvest, when the grain is drying on the cob

Question 804

[2 marks]Cereal crop management and legume storage
Name the insect pest whose caterpillar feeds in the funnel of a young maize plant and then tunnels into the stem.

Answer this when you sit the paper.

Question 805

[3 marks]Cereal crop management and legume storage
To what moisture content must a legume crop be dried before it is put into store?
  1. ADown to roughly a tenth of its weight as water, so that moulds cannot grow
  2. BDown to about a third of its weight as water, so that the seed stays alive
  3. CDown to half of its weight as water, so that the seed does not become brittle
  4. DIt does not need drying at all if the store itself is a cool and shady place

Question 806

[3 marks]Cereal crop management and legume storage
Stored beans are found to be holed by weevils. Which measure controls the pest without ruining the crop?
  1. AWet the beans lightly so that the weevils drown inside the bags in the store
  2. BMix a registered grain protectant through the beans and store them sealed
  3. CSprinkle the bags with a general purpose insecticide meant for spraying cotton
  4. DLeave the bags open so that the weevils can fly out of the store on their own

Question 807

[2 marks]Cereal crop management and legume storage
How should a farm store holding bagged legumes be built and kept?
  1. AShared with the fertiliser and the chemical store to save space on the farm
  2. BDry and ventilated, rodent proofed, with the bags stacked clear of the floor
  3. CSealed with no ventilation at all, and the bags stacked hard against the wall
  4. DOpen on all four sides so that rain can wash the dust off the bags each week

Question 901

[3 marks]Orchard siting and marketing of cut flowers or fruits
Why is the bottom of a valley a poor place to plant an orchard of deciduous fruit?
  1. AWind blows hardest in a valley bottom and blows all of the fruit off
  2. BThe sun never reaches a valley bottom at any time of the growing year
  3. CCold air settles there on clear nights, so frost damages the blossom
  4. DThe soil in a valley bottom is always too shallow for a tree to root in

Question 902

[3 marks]Orchard siting and marketing of cut flowers or fruits
What kind of soil is looked for when an orchard site is chosen?
  1. AHeavy clay that holds water at the surface all through the wet season each year
  2. BPure river sand, because fruit trees take all of their nutrients from the air
  3. CDeep and well drained, so that the roots can go down and never stand in water
  4. DShallow over rock, so that the roots spread sideways and hold the tree upright

Question 903

[2 marks]Orchard siting and marketing of cut flowers or fruits
Why must an orchard site have a reliable water supply, even in a high rainfall district?
  1. ATrees need water through the dry months, and fruit sizing depends on it
  2. BWater is needed only to wash the fruit after it has been picked and graded
  3. CThe trees are watered only in the year they are planted and never again
  4. DWater is needed to keep the orchard soil permanently flooded all season

Question 904

[2 marks]Orchard siting and marketing of cut flowers or fruits
Why does proximity to a good road and a market matter when siting an orchard?
  1. AFruit bruises and perishes, so it must reach the buyer quickly and gently
  2. BA tarred road makes the trees grow faster because of the heat it gives off
  3. CBuyers will only pay for fruit that they have watched being picked themselves
  4. DThe law requires every orchard in Zimbabwe to be within sight of a main road

Question 905

[3 marks]Orchard siting and marketing of cut flowers or fruits
Zimbabwean cut flowers are moved from the greenhouse to a cold room within hours of cutting, and are kept cold until they are sold. Why?
  1. ACold makes the stems grow longer in transit, which is what the auctions pay for
  2. BCold kills every insect on the flowers so that no inspection is needed at all
  3. CCold changes the colour of the petals to the shade the export buyers prefer
  4. DCold slows the flower's own ageing, so the vase life the buyer gets is longer

Question 906

[3 marks]Orchard siting and marketing of cut flowers or fruits
Which marketing arrangement gives a Zimbabwean flower or fruit exporter the most certain outlet?
  1. ASending the crop to the market only in the weeks when local prices are lowest
  2. BA contract agreed with a buyer before the season, setting volume and standard
  3. CCarrying the produce to the nearest roadside and selling to passing motorists
  4. DWaiting until the crop is picked and then looking for whoever will take it

Question 907

[2 marks]Orchard siting and marketing of cut flowers or fruits
Before sale, fruit is sorted into uniform classes according to size, colour and freedom from blemish. Name this operation.

Answer this when you sit the paper.

Question 1001

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
In what order are the main operations carried out when a broiler is slaughtered and dressed on a farm?
  1. AScald the bird, chill it, eviscerate it, then bleed it and pluck the feathers
  2. BBleed the bird, scald it, pluck it, then eviscerate, wash and chill the carcass
  3. CPluck the bird, bleed it, chill the carcass, then scald it and eviscerate it fully
  4. DEviscerate the bird, then bleed it, pluck the feathers and scald the carcass

Question 1002

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
A slaughtered bird is dipped in water at about 60 degrees Celsius for less than a minute. What does this achieve?
  1. AIt sterilises the whole carcass so that no further washing is needed at all
  2. BIt raises the mass of the carcass so that the dressing percentage is higher
  3. CIt loosens the feathers in their follicles so that plucking is quick and clean
  4. DIt cooks the outer layer of meat so that the carcass will keep for much longer

Question 1003

[2 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
Why is a slaughtered animal or bird allowed to bleed out fully before it is dressed?
  1. ABleeding is done only because the law of the country requires it to be done
  2. BBleeding removes the fat from the carcass so that the meat is much leaner
  3. CBlood left in the carcass spoils quickly and darkens the appearance of the meat
  4. DBlood left in the carcass makes the animal much heavier and so worth more money

Question 1004

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
Why must the gut be removed without being cut or torn during evisceration?
  1. AThe gut has to stay whole so that the dressing percentage can be worked out
  2. BGut contents carry organisms such as Salmonella that would contaminate the meat
  3. CThe gut contents are needed whole because they are sold separately as animal feed
  4. DA cut gut releases a gas that makes the carcass swell up and split its own skin

Question 1005

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
Which set of measures keeps a farm slaughter slab hygienic?
  1. AA shaded earth floor, shared knives and workers in their own field clothes
  2. BSlaughtering beside the kraal so the dogs can clear away all of the waste
  3. CLeaving the offal on the slab so that it can be sorted at the end of the day
  4. DClean water, disinfected knives, protective clothing and healthy workers

Question 1006

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
Why is a dressed carcass chilled as soon as it has been washed?
  1. AChilling removes the last of the feathers that plucking may have left behind
  2. BA cold carcass is easier to cut up because the bones become soft when chilled
  3. CBacteria multiply fast in a warm carcass, and cold slows that growth right down
  4. DChilling adds water to the meat so that the carcass weighs more when it is sold

Question 1007

[3 marks]Slaughtering and dressing poultry or rabbits, hygiene and dressing percentage
A live bird weighs 2,5 kg. After dressing, its carcass weighs 2,0 kg. What is the dressing percentage?
  1. A20 %
  2. B50 %
  3. C80 %
  4. D125 %

Question 1101

[3 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Why must the protein in a pig's ration be of higher quality than that in a cow's ration?
  1. AA pig has no rumen microbes to build the amino acids it cannot make itself
  2. BA pig grows far more slowly than a cow and so needs its protein concentrated
  3. CA pig drinks less water than a cow and cannot digest any protein without it
  4. DA pig has a much longer gut than a cow, so the protein passes through unused

Question 1102

[3 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Why is a pig ration built mainly on maize meal and protein concentrates rather than on veld hay?
  1. AVeld hay is a great deal more expensive than maize meal everywhere in Zimbabwe each year
  2. BA pig refuses to eat any feed that is not ground into a fine meal before feeding
  3. CHay carries too much protein for a pig and would make the growing animal too fat
  4. DA pig cannot digest much fibre, so a bulky roughage ration leaves it short of energy

Question 1103

[2 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
How does the ration of a lactating sow differ from that of a dry sow of the same weight?
  1. AIt is smaller and plainer, because a suckling sow moves about far less than usual
  2. BIt is exactly the same, since a sow's needs do not change once she is full grown
  3. CIt contains no protein at all, because the piglets take their protein from the milk
  4. DIt is larger and richer, because milk production draws heavily on her reserves

Question 1104

[2 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Why must clean drinking water always be available to a pig?
  1. AWater is the only source of the minerals that a growing pig needs in its diet
  2. BA pig will not eat any solid feed at all unless the feed is soaked in water first
  3. CWater washes the pig's skin clean so that no external parasites can attach to it
  4. DA pig cannot sweat freely and needs water for cooling as well as for digestion

Question 1105

[2 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
A cow dies suddenly and dark blood that will not clot oozes from the nose and the anus. Veterinary advice is that the carcass must not be opened. Name the disease.

Answer this when you sit the paper.

Question 1106

[3 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Why must the carcass of an animal suspected of having died of anthrax never be cut open?
  1. ACutting the carcass releases a gas that poisons anyone standing close by
  2. BThe blood inside is under pressure and would flood the surrounding grazing
  3. CThe organism forms spores in the air that survive in the soil for many years
  4. DThe meat would be sold before the veterinary officer had a chance to inspect it

Question 1107

[3 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Which set of measures is used to prevent and control anthrax in a Zimbabwean cattle herd?
  1. AMoving the herd to fresh grazing and selling the survivors at the nearest sale
  2. BFeeding a course of antibiotics to the herd every month through the wet season
  3. CAnnual vaccination, prompt reporting to the veterinary officer and quarantine
  4. DWeekly dipping of the herd and dosing every animal against internal worms

Question 1108

[2 marks]Nutritional requirements of a pig or donkey and a bacterial disease of livestock
Anthrax, blackleg and brucellosis are grouped together because each is caused by
  1. Aan internal parasite, which is why a drench clears all three from the herd
  2. Ba mineral shortage, which is why a lick block prevents all three conditions
  3. Ca bacterium, which is why an antibiotic can help and a vaccine can prevent it
  4. Da virus, which is why an antibiotic is the standard treatment for all three of them

Question 1201

[3 marks]Exotic cattle breeds and acquired immunity
Which features make the Brahman a useful exotic beef breed in the hotter parts of Zimbabwe?
  1. AA long thick woolly coat and short legs, which keep the animal warm through the night
  2. BA very high milk yield with a low appetite, so it needs no supplementary feed
  3. CAn inability to walk far, which keeps the animal close to the water point
  4. DA loose short coated skin and a hump, giving heat tolerance and tick resistance

Question 1202

[3 marks]Exotic cattle breeds and acquired immunity
A Zimbabwean dairy farmer keeps Holstein Friesian cows. What must be provided if the breed is to perform here?
  1. AHigh quality feeding, shade and water, because the breed suffers in the heat
  2. BNothing beyond the veld, since the breed thrives on rough grazing unaided
  3. CA dry hot paddock with no shade, because the breed needs sun for milk let down
  4. DVery little water, because a high yielding cow drinks less than a beef animal

Question 1203

[2 marks]Exotic cattle breeds and acquired immunity
Why is an exotic bull often crossed with indigenous cows rather than replacing the herd outright?
  1. AThe cross always produces twin calves, so the herd doubles in one season
  2. BThe cross keeps the local hardiness and adds the exotic growth and size
  3. CThe cross produces animals that never need to be dipped or vaccinated
  4. DA pure exotic herd is not permitted in the communal areas of Zimbabwe

Question 1204

[2 marks]Exotic cattle breeds and acquired immunity
Why might a smallholder choose a Jersey rather than a Friesian as a house cow?
  1. AShe needs no shade, no clean water and no tick control of any kind
  2. BShe can be worked in the plough all morning and still milk in the evening
  3. CShe is small, eats less and gives milk with a high butterfat content
  4. DShe gives the largest total volume of milk of any dairy breed there is

Question 1205

[3 marks]Exotic cattle breeds and acquired immunity
A calf that suckles colostrum in its first hours is protected against disease for a few weeks. What kind of immunity is that?
  1. ANaturally acquired passive immunity, from antibodies made by the dam
  2. BNaturally acquired active immunity, from antibodies the calf makes itself
  3. CArtificially acquired active immunity, from a vaccine given at birth
  4. DInherited immunity, carried in the genes the calf received from its sire

Question 1206

[3 marks]Exotic cattle breeds and acquired immunity
A herd is vaccinated against a disease and the animals build their own protection over the following weeks. What kind of immunity is that?
  1. AArtificially acquired active immunity, since the animal makes its own antibodies
  2. BArtificially acquired passive immunity, since the vaccine supplies the antibodies
  3. CNaturally acquired active immunity, since no injection was involved in any way
  4. DNaturally acquired passive immunity, since the protection lasts only a few days

Question 1207

[2 marks]Exotic cattle breeds and acquired immunity
Name the protein made by an animal's immune system that attaches to a particular disease organism and helps destroy it.

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The answers, and why they are the answers

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