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.

41. The exchange of genes between homologous chromosomes is called

  • A. crossing over
  • B. back cross
  • C. test cross
  • D. mutation

42. biology past question

The diagrams above are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which of the offspring are all homozygous?

  • A. P
  • B. Q
  • C. S
  • D. R

43. Genes that remain linked are those

  • A. close to each other on the chromosomes
  • B. on the same locus on the chromosomes
  • C. on the homologous chromosomes
  • D. which are allelic pair

44.   plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?

  • A. 14
  • B. 56
  • C. 28
  • D. 7
 

45. The chemical bond that holds the bases of the two strands of DNA together is

  • A. oxygen bond
  • B. hydrogen bond
  • C. electrovalent bond
  • D. covalent bond

46. biology 9

The diagram above is an illustration of one of the theories of evolution. Who proposed the theory in the illustration?

  • A. Louis Pasteur
  • B. Gregor Mendel
  • C. Robert Hooke
  • D. Jean Lamarck
 

47.biology 9

The theory supports

  • A. natural selection
  • B. struggle for survival
  • C. independent assortment
  • D. the use and disuse of body parts

48. In evolution, fossils are naturally preserved in

  • A. rocks
  • B. water
  • C. chemicals
  • D. trees
 

49. In evolution, fossils are naturally preserved in

  • A. rocks
  • B. water
  • C. chemicals
  • D. trees
 

50. Which of the following is not a social insect?

  • A. termite
  • B. housefly
  • C. honeybee
  • D. ant
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