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Biology 1990 JAMB Past Questions

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41
Which set of disease is spread mainly by insect vectors?
  • A. Cholera, tenia and gonorrhoea
  • B. Poliomyelitis, tuberculosis and syphilis
  • C. Cholera, malaria and tuberculosis
  • D. Malaria, cholera and river blindness
View Answer & Discuss (5) JAMB 1990
42
Which of the following constitute pollution?
  • A. Droppings from birds
  • B. loud disco sound
  • C. A pack of cigarettes
  • D. Refuse in an incinerator
View Answer & Discuss (16) JAMB 1990
43
An acidic soil can be improved upon by
  • A. sedimentation
  • B. leaching
  • C. flocculation
  • D. watering
View Answer & Discuss (4) JAMB 1990
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44

What do bacteria in root nodules derive from the host plant?

  • A. Protection and minerals
  • B. Water and minerals
  • C. Carbonhydrates and water
  • D. Protection and carbohydrates
View Answer & Discuss (16) JAMB 1990
45
Free nitrogen is released to the atmosphere by
  • A. Nitrogen-fixing bacteria
  • B. nitrifying bacteria
  • C. denitrifying bacteria
  • D. saprophytic bacteria
View Answer & Discuss (1) JAMB 1990
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