Integrated Science WASSCE 2015

1. Bacteria belong to Kingdom

A. Prokaryotae
B. Fungi
C. Animalia
D. Proctoctista

2. Which of the following organisms is a producer?

A. Rhizopus
B. Spirogyra
C. Grasshopper
D. Virus

3. Lactic acid can be found in

A. palm oil
B. orange
C. grape
D. sour milk

4. Killing water snails with mulluscide results in the control of

A. shistosomiasis
B. onchocercasis
C. ascariasis
D. trypanosomiasis

5. Biodiversity is defined as

A. classification of living things
B. variation in forms of life
C. study of living things
D. living and non-living things in habitats

6. Which of the following features does not adapt a leaf of a flowering plant for photosynthesis?

A. Possession of starch
B. Being flat and broad
C. Being thin in shape
D. Possession of numerous stomata

7. A tall maize with genotype TT is crossed with a short maize plant with genotype tt. What will be the genotype of their offspring?

A. 100% Tt
B. 50% tt
C. 50% TT
D. 100% TT

8. Salting of fish for preservation uses the principle of

A. plasmolysis
B. osmosis
C. diffusion
D. active transport

9. Ultrafiltration in the Bowman’s capsule of a mammalian kidney results from

A. efferent arteriole being wider than the afferent arteriole
B. afferent arteriole being wider than the efferent arteriole
C. afferent arteriole being longer than the efferent arteriole
D. efferent arteriole being longer than the afferent arteriole

10. Aristotle classification of living organisms was based on the

A. anatomical and histological differences in the organisms
B. structural similarities and differences in the organisms
C. appearance and movement of the organisms
D. evolutionary trend in the organisms

11. Fats and oils are the esters formed from the reaction between

A. glycerine and sodium hydroxide
B. glycerol and long chain fatty acids
C. glycerine and long chain of fatty acids
D. glycerol and sodium hydroxide

12. Which of the following substances is present in both glomerular filtrate and urine?

A. Amino acids
B. Urea
C. Glucose
D. Blood proteins

13. Which of the following statements about inhaled air and exhaled air is correct?

A. inhaled air contains more carbon dioxide than exhaled air
B. inhaled air contains same amount of oxygen as in exhaled air
C. exhaled air contains more oxygen than inhaled air
D. exhaled air contains more carbon dioxide than inhaled air

14. An onion bulb can be described as one which

A. has fibrous roots arising from the base and a short conical stem that grows vertically
B. grows obliquely from an underground part of the parent plant
C. grows horizontally underground and has long internodes
D. has thick, horizontal stem and adventitious roots arising from the nodes

15. The scrotum of a human is located externally because

A. the temperature for sperm production should be higher than the body temperature
B. it will take too much space in the abdomen
C. it will have limited space in the abdomen
D. the temperature for sperm production should be lower than the body temperature

16. The human eye blinks when bright light is shown on it because

A. it is an automatic response
B. the action is initiated from the cerebrum
C. of delayed response
D. it is under the control of the cerebellum

17. Green manure is beneficial to the soil if the plant material is

A. ploughed into the moist soil just before flowering
B. grown with fertilizer
C. free from pests
D. ploughed into the moist soil after harvesting

18. Soil conservation can be achieved through

A. mixed cropping
B. intercropping
C. agroforestry
D. introduction of green legumes

19. The most effective method of reducing erosion on hilly lands is by

A. terracing
B. applying organic manure
C. creating wind breaks
D. erection of barriers

20. The clustering together of chicks under the hover in a brooder house is an indication that

A. the temperature in the brooder house is very low
B. there is insufficient illumination in the brooder house
C. a foreign object has come into the brooder house
D. there is outbreak of disease

21. Which of the following signs are associated with parturition in pigs?

I. Udder drops
II. Teats become pinkish-red in colour
III. Vulva slackens
IV. Inability to squeeze milk out of teats

A. II and III only
B. I and IV only
C. I, II and IV only
D. I, II and III only

22. The use of watering can is necessary in crop production

A. when the crops are at the nursery stage
B. during rainy season
C. after harvesting of the field crops
D. when the farm is far from the source of water

23. Which of the following crops is stored in barns?

A. Pineapple
B. Cowpea
C. Cassava
D. Yam

24. Which of the following effects are associated with late harvesting of maize?

I. Increase in crop yield
II. Rain may cause grain to rot
III. Weevils may attack and destroy grain
IV. Exposure of maize to attacks by birds and rodents

A. I, II and III only
B. III and IV only
C. I and II only
D. II, III and IV only

25. An example of an ectoparasite

A. tick
B. tapeworm
C. housefly
D. liver fluke

26. The true stomach of a ruminant is the

A. reticulum
B. omasum
C. abomasum
D. rumen

27. In a simple electric circuit, the device that regulates the current flow is the

A. resistor
B. amplifier
C. ammeter
D. rheostat

28. Evaporation of a liquid increases with

A. decrease in the exposed surface area
B. increase in atmospheric pressure
C. decrease in density of the liquid
D. decrease in temperature

29. A laterally inverted image is one which is

A. virtual and formed behind the mirror
B. real and formed behind the mirror
C. real and formed in front of a mirror
D. virtual and formed in front of the mirror

30. The vacuum between two walls in a vacuum flask minimizes heat transfer by

I. conduction
II. convection
III. radiation

Which of the above statements is/are correct?

A. II and III only
B. I and II only
C. I only
D. I, II and III

31. Which of the following methods is/are used in making magnets?

I. Single touch
II. Double touch
III. Electrical

A. II and III only
B. I and III only
C. I only
D. I, II and III

The diagram below is an illustration of NPN transistor. Study it carefully and answer Question
32. The part labelled I is
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A. emitter
B. collector
C. base
D. resistor

The diagram below is an illustration of NPN transistor. Study it carefully and answer Question

33. The function of the part labelled II is to supply
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A. negative charges
B. voltages
C. protons
D. positive charges

34. The efficiency of a machine is always less than 100% due to

A. the greater load to effort ratio
B. the work done when operating it
C. the work done against friction
D. its high mechanical advantage

35. A car travelling at uniform speed of 40.0 ms-1 covers the distance between two stations in 2.0 minutes. Determine the distance between the two stations

A. 4.8 km
B. 2.4 km
C. 0.2 km
D. 8.0 km

36. Which of the following statements about the diagram below is correct?
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A. Position Y is called umbra
B. Illustrates an eclipse of the sun
C. Position Y is called penumbra
D. Illustrates an eclipse of the moon

37. A piece of metal of volume 25 cm3 has a mass of 45 g. Determine its density in kgm-3.

A. 5.66 x 103 kgm-3
B. 1.80 x 103 kgm-3
C. 0.56 x 103 kgm-3
D. 1.80 x 104 kgm-3

38. Land and sea breezes occur as a result of

A. the revolution of the earth
B. the different position of the moon
C. conventional currents
D. heat transfer by land

39. Sound energy can be converted into an electrical energy by

A. microphone
B. loudspeaker
C. amplifier
D. radio

40. Examples of hydrocarbons belonging to alkane series are

A. C2H8­ and C4­H8
B. C2H2 ­and C3­H6
C. C2H5 ­and C3­H8
D. C4H10 and C2­H4

41. Which of the following processes is a physical change?

A. Separation of sand from water
B. Fermentation of palm wine
C. Electrolysis of aqueous sodium chloride
D. Burning of magnesium ribbon in air

42. An atom of element X is made up of 17 electrons and 18 neutrons. What is the mass number of the element?

A. 34
B. 18
C. 17
D. 35

43. Steel is preferred to pure iron for construction work because

A. iron poses more health hazard than steel
B. steel is harder and stronger than iron
C. steel is cheaper than iron
D. steel is more shiny than iron

44. A strong acid is one which

A. gives high concentration of hydrogen ions in solution
B. has a low concentration of water
C. has a strong corrosive power
D. gives high concentration of hydroxide ions in solution

45. Which of the following pairs of compounds will produce an ester when warmed with few drops of concentrated sulphuric acid?

A. Ethane and ethanoic acid
B. Ethanol and ethanoic acid
C. Ethanol and ethane
D. Ethanoic acid and ethane

46. Which of the following processes is associated with rusting of iron? It

A. releases carbon dioxide
B. takes place in the presence of dry air
C. is a physical change
D. produces an oxide of iron

47. A test for hydrogen in the laboratory is

A. production of pungent smell
B. a ‘pop’ sound produced with a glowing splint
C. a characteristic irritating smell
D. rekindling of glowing splint

48. A quantity of NaCl was dissolved in 100.0 cm3 of solution to obtain 0.5M NaCl solution. Determine the mass of NaCl used.
[ Na = 23, Cl = 35.5 ]

A. 29.25 g
B. 5.85 g
C. 2.93 g
D. 58.50 g

The diagram below warns of hazard. Study it carefully and answer question

49. What does the diagram signify?
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A. Irritant
B. Explosive
C. Corrosive
D. Highly inflammable

50. A substance which can be associated with this hazard illustrated is
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A. gun powder
B. x-ray
C. ethanol
D. hydrogen peroxide

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