Biology 2021 Past Questions | JAMB

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.  From the information above, determine the percentage of water in the given soil sample?

  • A. 20%
  • B. 25%
  • C. 40%
  • D. 50%


I. Stomata –> Spirogyra

II. Alveoli –> Earthworm

III. Malpighian tubule -> Mammal

IV. Contractile vacuole -> Protozoa

Which of the above structures is correctly matched with the organisms in which it is found?

  • A. II
  • B. I
  • C. IV
  • D. III

33.  The sequence of the one-way gaseous exchange mechanism in a fish is

  • A. mouth –> operculum -> gills
  • B. mouth -> gills > operculum
  • C. operculum > gills -> mouth
  • D. gills -> operculum –> mouth

34.  Which of the following is true in blood transfusion?

  • A. A person of blood group AB can donate blood only to another person of blood group AB
  • B. Persons of blood groups A and B can donate or receive blood from each other
  • C. A person of blood group AB can receive blood only from persons of blood group A or B
  • D. A person of blood group O can donate only to a person of blood group O

35. The plants that grow in deserts or very dry areas are referred to as

  • A. hydrophytes
  • B. epiphytes
  • C. xerophytes
  • D. mesophytes

36. A pollutant that is biodegradable is

  • A. heavy metals
  • B. cellophane
  • C. sewage
  • D. crude oil

37. The movement of part of a plant in response to external stimulus of no particular direction is

  • A. taxism
  • B. tropism
  • C. haptotropic movement
  • D. nastic movement

38. The mutation theory of organic evolution was propounded by

  • A. Gregor Mendel
  • B. Hugo de Vries
  • C. Jean Lamarck
  • D. Charles Darwin

39.  If both parents are heterozygous for a trait. the probability that an offspring will be recessive for that trait is

  • A. 1/2
  • B. 1/4
  • C. 1
  • D. ¾

40. Blood circulation in a mammal is said to be double because 

  • A. it passes twice through the heart in a complete circuit
  • B. it moves in both arteries and veins
  • C. it circulates in both the heart and other organs
  • D. the heart contains auricles and ventricles
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