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1501
Which of the following is the unit of transmission of hereditary traits in living organisms
  • A. Nucleus
  • B. Nucleolus
  • C. Gametes
  • D. Genes
  • E. Chromosomes
View Answer & Discuss (2) WAEC 1991
1502
The role of dead organic matter in the soil is to
  • A. make the soil black
  • B. increase the mineral salt content
  • C. provide food for all living organisms
  • D. increase the acidity of soil
  • E. make the soil more porous
View Answer & Discuss WAEC 1991
1503
Species do not change in order to survive. The environment determines which organism survives to reproduce. These statements
  • A. explains theory of acquired characters
  • B. supports Jean Lamarck's theory of use and disuse
  • C. support the idea of survival of the fittest
  • D. are refuted by fossil record
  • E. imply that organisms modify their environment in order to survive
View Answer & Discuss WAEC 1991
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1504

Which of the following may not contribute to environmental pollution?

  • A. Solar energy radiation
  • B. Industrial waste
  • C. Waste disposal
  • D. Smoke
  • E. Nuclear power plant
View Answer & Discuss (6) WAEC 1991
1505
Succession is best described as
  • A. a process whereby organisms systematically colonize a barren habitat until stable community is formed
  • B. a process whereby plant occupy a barren habitat until a suitable habitat is formed
  • C. a process whereby animals occupy a barren habitat until a suitable habitat is formed
  • D. the subsequent taking over of the land through emigration or dispersal of seeds
  • E. the replacement of weaker plants and animals by stronger ones
View Answer & Discuss WAEC 1991
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