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AGRICULTURAL SCIENCE (Objective Questions And Answers)


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THEORY QUESTIONS
WAEC SYLLABUS

WASSCE 2005

Objectives



1. Inadequate food production in most developing countries is due to

A. high population growth.

B. inadequate technology

C. infestation of farms by pests

D. scarcity of labour.


2. Which of the following groups of basic amenities should be provided in rural areas for improved agricultural productivity?

A. Water, electricity and health care centres.

B. Electricity, Guest houses and water.

C. Health care centres, water and airports.

D. Roads, airports and recreational centres.


3. Government laws and reforms are aimed at

A. increasing agricultural production

B. controlling farm profits

C. discouraging investment in agriculture.

D. encouraging importation of agricultural produce.


4. In order to ensure that crops and animal diseases are not transferred across international boundaries, government must

A. have a programme on agricultural education

B. endeavour to produce only disease resistant species.

C. have and enforce quarantine services

D. increase surveillance of its borders by security agents.


5. The role of science and technology in the development of agriculture includes the following except

A. Provision of insecticides and drugs.

B. provision of good road network

C. introduction of artificial insemination centres.

D. setting up produce marketing boards.


ANSWERS

6. The total land area of a country available for farming depends on the

A. level of literacy of farmers.

B. climate of the area

C. sex distribution of the population.

D. number of houses and other structures.


7. The scarcity of land often compels peasant farmers to practice

A. Deforestation

B. selective exploitation

C. taungya system

D. afforestation


8. In West Africa, a greater part of the land is used for

A. livestock farming

B. arable cropping

C. building houses

D. games reserves.


9. A piece of land can be considered more suitable for livestock production than for crop production when it is

A. moderately marshy

B. stony

C. fertile

D. infested with weeds.


10. The first vegetation zone which runs across the coats of most West African countries is the

A. derived savanna

B. mangrove forest

C. guinea savanna

D. rain forest.


ANSWERS

11. The most active agent of physical weathering in arid regions is

A. wind

B. water

C. temperature.

D. ice.


12. Soils in forest areas would normally have

A. low moisture content

B. high proportion of sand

C. high proportion of humus

D. low microbial activity.


13. Clay particles hold cartions because they

A. are negatively charged

B. become hardened when dry

C. are very small in size

D. have definite shapes


14. Under which of the following conditions will organic matter in the soil decompose fastest?

A. Optimum pH

B. Low Temperature

C. Anaerobic condition

D. Waterlogged condition.


15. Which of the following materials can be applied to the soil in order to correct yellowing of leaves?

A. Lime

B. Urea

C. Gypsum

D. Bone Meal.


ANSWERS

16. One importance of cover crops is that they

A. provide shade for crops

B. protect crops from pests

C. increase soil acidity.

D. suppresses weed growth.


17. The appropriate irrigation method for upland rice field is

A. sprinkler

B. drip

C. flooding

D. underground.


18. Drainage refers to

A. removal of excess water from the soil

B. removal of nutrients from the soil

C. addition of water to the soil

D. protection of soil from erosion.


19. Energy in fossil materials may be harnessed as

A. water energy

B. wind energy

C. electrical energy

D. fuel energy.


20. A decorticator is useful in the processing of

A. maize

B. cotton

C. cocoa

D. groundnut


ANSWERS

21. Which of the following types of survey reveals the physical features of farmlands?

A. Soil survey

B. Topographical survey

C. Chain survey

D. Compass survey.


22. Calculate the area of a rectangular vegetable garden measuring 100m by 26m in hectares

A. 0.250

B.0.200

C.0.125

D.0.004


23. Farm mechanization does not

A. involve the use of motorized equipment

B. require much capital

C. lead to unemployment

D. involve the use of only heavy machinery.


24. A prolonged wet season at the early season of growth in cotton will lead to

A. good vegetative growth and high yield of lint

B. tall plant with few bolls

C. premature dropping of leaves

D. waterlogged soil which increases availability of soil nutrients.


25. The by-product in plant photosynthesis

A. carbon dioxide

B. carbohydrates

C. hydrogen

D. oxygen.


ANSWERS

26. Which of the following reasons explains why fertilizers are added to soils

A. Prevention of erosion

B. Increasing the organic matter content

C. Increasing the water retention capacity

D. Increasing the nutrient level.


27. A crop which is usually propagated sexually is

A. banana

B. pineapple

C. cowpea

D. ginger.


28. Transplanting is best carried out in the evening because

A. it allows for greater plant respiration

B. roots show positive geotropism

C. moisture losses are low during cold weather

D. plants grow faster in the dark.


29. Some cassava tubers are poisonous to non-ruminants because they contain

A. hydrochloric acid

B. hydrocyanic acid

C. sodium chloride

D. sodium hydroxide.


30. Which of the following factors does not affect the distribution of pasture grasses?

A. Wind

B. Temperature

C. Soil

D. Pests.


ANSWERS

31. Selective exploitation means felling of trees of

A. different ages and girths

B. specific ages and girths

C. different girths and same species

D. different girths and different species.


32. Streak disease of crops commonly attacks

A. millet

B. sorghum

C. maize

D. rice.


33. Most viral diseases of plants are transmitted by

A. wind

B. rain

C. insects

D. rodents.


34. Viral diseases of crop plants are best controlled by

A. planting resistant varieties

B. applying fungicides

C. applying insecticides

D. flooding farmlands.


35. The following problems are likely to be caused by insects except

A. loss of leaves of crop plants

B. rottening of cobs in storage

C. transmission of viral diseases

D. reduction of grains in storage to powder.


ANSWERS

36. Weed plants which grow on other plants without deriving nutrients from them are called

A. sedges

B. epiphytes

C. decomposers

D. saprophytes.


37. When a farm land is heavily infested with striga, it may be concluded that the farmland

A. is undergoing drainage

B. had not been regularly irrigated

C. may have been used for growing guinea corn

D. may have been used for cowpea production.


38. Mulching

A. reduces evaporation of water

B. increases soil acidity

C. prevents seedling diseases

D. improves soil texture.


39. An accessory sex gland in a bull is

A. prostrate gland

B. pituitary gland

C. thyroid gland

D. pancreatic gland.


40. The most important reason for the low livestock population in the rain forest zone is the

A. fast rate at which pasture crops become fibrous

B. shortage of forage crops during the long dry season

C. growth and proliferation of pathogens

D. thick vegetation cover which impedes animal movement.


ANSWERS

41. Which of the following feedstuffs does not contain phosphorus?

A. Blood meal

B. Limestone

C. Fish meal

D. Oyster meal.


42. When an animal eats wood and eats iron railings instead of the diet given to it, it is likely that the

A. animal is on heat

B. ambient temperature is too high

C. diet is deficient in essential elements

D. animal has a pathogenic disease problem.


43. An indication that chicks are comfortable in a brooder is that they

A. move away from the source of heat

B. pant and sit with their mouths open

C. spread themselves uniformly under the hover

D. huddle together.


44. Mastitis is a disease which affects the

A. scrotum

B. udder

C. dewlap

D. hump.


45. The following are signs of ill-health in farm animals except

A. watery faeces

B. bright eyes

C. loss of appetite

D. nasal discharge.


ANSWERS

46. A protozoon organism causes

A. coccidiosis

B. anthrax

C. rinderpest

D. aspergillosis.


47. An animal infected by trypanosomiasis usually develops

A. bloat and diarrhoea

B. sore legs and running nose

C. anaemia and swollen lymph gland

D. swollen legs and constipation.


48. The purpose of vaccination is to

A. treat parasites infestation

B. prevents disease infection

C. control parasites

D. treat diseases.


49. Which of the following livestock endoparasites is a hermaphrodite?

A. Liverfluke

B. Trypanosome

C. Tapeworm

D. Roundworm.


50. The most effective method of controlling ecto-parasites in farm animals is by regular

A. exposure of animals to sunlight

B. dipping of animals in a solution of pesticides

C. hand-picking of ecto-parasites

D. isolation of infested animals.


ANSWERS

51. A common means of aerating a fish pond is by stirring the water and

A. removing dead and decaying matter

B. adding water plants

C. adding cold water

D. pumping oxygen into the water.


Use the diagram below to answer questions 52 and 53. RR rr R R Rr





52. The diagram explains Mendel’s Law of

A. separation genes

B. mutation of genes

C. heterozygosity of genes

D. homozygosity of genes.


53. The components labeled I are the

A. gametes

B. parents

C. F1 generation

D. F2 generation.


54. Heterosis in animal breeding is referred to as

A. hybrid vigour

B. dominance

C. recessivity

D. mutation.


55. In areas where labour is scarce and land is abundant, farmers tend to

A. manage diary animals intensively rather than beef animals

B. practice mechanized farming

C. maximize returns on land rather than on labour

D. employ more hands to work on the land.


ANSWERS

56. The supply of farm produce to markets in West Africa is mostly dictated by

A. governments

B. commodity boards

C. climatic conditions

D. the consumers.


57. Farm insurance schemes do not cover losses due to

A. inadequate cultural practices

B. heavy pest infestation

C. flood

D. drought.


58. The main aim of preparing a farm income and expenditure is to

A. record all purchases

B. outline the sales of the farm

C. outline both sales and purchases

D. calculate profit or loss.


59. Which marketing agent normally makes the biggest profit margin per unit? The

A. processor

B. wholesaler

C. retailer

D. commission agent.


60. The most inappropriate means of disseminating new ideas and techniques to the peasant farmer is by use of

A. radio

B. television

C. internet

D. cinema.



WASSCE JUNE 2005 AGRICULTURAL SCIENCE

OBJECTIVE TEST ANSWERS

​1. B 2.A 3.A 4.C 5.D 6.B 7.C 8.C 9.D 10.B

11.A 12.C 13. A 14.C 15.B 16.D 17.A 18.A 19.D 20.A

21.B 22.A 23.D 24.B 25. D 26.D 27.C 28.C 29.B 30.D

31.B 32.C 33.C 34.A 35.B 36.B 37. C 38.A 39.A 40.C

41.B 42.C 43.C 44.B 45.B 46.A 47. C 48.B 49.C 50.B

51.A 52.A 53.A 54.A 55.B 56.D 57. B 58.D 59.B 60.C


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