Biology 2018 Past Questions | WAEC

Study the following Biology past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

31. Which of the following instruments is used to determine the turbidity of water?

  • A. hygrometer
  • B. hydrometer
  • C. secchi disc
  • D. rain gauge

32. In an ecosystem, the least efficient energy transfer link is from the

  • A. secondary consumers to decomposers
  • B. sun to producers
  • C. primary consumers to secondary consumers
  • D. producer to primary consumers

33. Xerophytes have the following characteristics aimed at conserving water except

  • A. thick cuticle
  • B. broad leaf surfaces
  • C. sunken stomata
  • D. waxy cuticle

34. An association between living organisms in which one lives on and feeds at the expense of the other is known as

  • A. commensalism
  • B. predation
  • C. parasitism
  • D. mutualism

35.  When large numbers of organisms share limited space and resources, the immediate result is

  • A. extinction
  • B. emigration
  • C. competition
  • D. immigration
 

36. Which of the following disease ic caused by a bacterium?

  • A. ringworm
  • B. poliomyelitus
  • C. syphilis
  • D. malaria

37.  Conservation of wildlife is necessary mainly because 

  • A. wild species cannot resist disease better than their domesticated species
  • B. many predator wild animals help in the control of pests
  • C. it prevents extinction of species
  • D. many people derive pleasure from observing wild animals

38.  Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

Patients X and Y were likely transferred with blood of genotype

  • A. OO
  • B. AO
  • C. BO
  • D. AA
 

39. Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

  • A. undergone an agglutination test
  • B. been asked for the blood group
  • C. been screened for HIV
  • D. undergone malaria test

40.  The greatest contribution to genetic studies was made by 

  • A. Gregor Mendel
  • B. Thomas Morgan
  • C. Charles Darwin
  • D. Robert Hooke
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