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Wednesday, 01 April 2026
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Biology Past Questions and Answers

Jamb Biology Questions

Question 16:
In a field experiment, the frequency of water leaf was observed to be 48 after 20 tosses of a 2m2 quadrat. What is the density of the plants in the field?
  • A 1.2 per m2
  • B 2.4 per m2
  • C 4.8 per m2
  • D 9.6 per m2
View Answer & Explanation
Question 17:
The supporting tissue in xylem is most poorly developed in
  • A Mangrove swamp plants
  • B Grassland plants
  • C Submerged water plants
  • D Desert plants
View Answer & Explanation
Question 18:
The addition of lime to clayed soil serves to
  • A Aid water retention
  • B Close up the texture
  • C Prevent water logging
  • D Improve capillary action
View Answer & Explanation
Question 19:
The excessive use of agro-chemicals could lead to the pollution of
  • A The lithosphere
  • B The atmosphere
  • C Fresh water
  • D Space
View Answer & Explanation
Question 20:
In a population study using the transect method, a student is likely to record the highest number of species in
  • A A tropical rain forest
  • B A guinea savanna
  • C A sahel savanna
  • D An estuarine swamp
View Answer & Explanation