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Biology JAMB Past Questions

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356

The origin of mineral particles in the soil is

  • A. humus
  • B. water
  • C. micro-organisms
  • D. weathered rock
  • E. organic matter
View Answer & Discuss (13) JAMB 1985
357

Atmospheric nitrogen is directly replenished in nature through

  • A. the activities of denitrifying bacteria
  • B. the breakdown of ammonium salts in the soil
  • C. the activities of nitrifying bacteria
  • D. the activities of nitrogen-fixing bacteria in root nodules
  • E. egestion, death and decay
View Answer & Discuss (13) JAMB 1985
358

The initial volume of water poured into 60g bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil is therefore

  • A. 46.7
  • B. 25.0
  • C. 20.0
  • D. 30.0
  • E. 58.3
View Answer & Discuss (19) JAMB 1985
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359
Viruses are regarded as non-living because they
  • A. can niether reproduce asexually nor sexually
  • B. cannot survive in their respective enviroments
  • C. do not possess characteristics that can be transmitted from one generation to the next
  • D. can neither respire nor excrete
View Answer & Discuss (15) JAMB 1986
360
Which of the following pairs are fully adapted to terrestrial life?
  • A. Ferns and algae
  • B. Ferns and mosses
  • C. Bryophytes and flowering plants
  • D. Flowering plants and conifers
View Answer & Discuss (6) JAMB 1986
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