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Biology 1983 JAMB Past Questions

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16

28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil?

  • A. 22.2
  • B. 55.6
  • C. 75.0
  • D. 25.0
  • E. 35.7
View Answer & Discuss (35) JAMB 1983
17
Which of the following diseases is NOT caused by a virus?
  • A. Rinderpest
  • B. Maize rust
  • C. Newcastle diseases
  • D. Swine fever
  • E. Cassava mosaic diseases
View Answer & Discuss (9) JAMB 1983
18

A centipede differs from a millipede by its

  • A. colour
  • B. numerous abdominal segment
  • C. paired legs on each abdominal segment
  • D. poison claws
  • E. cylindrical body
View Answer & Discuss (19) JAMB 1983
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19
An organism having one pair of identical genes is
  • A. a heterozygote
  • B. a hybride
  • C. an allelomorph
  • D. a homozygote
  • E. a diploid
View Answer & Discuss (2) JAMB 1983
20
Plants which can survive in places where the water supply is limited are
  • A. bryophytes
  • B. mesophytes
  • C. xerophytes
  • D. hydrophytes
  • E. pteridophytes
View Answer & Discuss (5) JAMB 1983
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