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Saturday, 23 May 2026
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Biology Past Questions and Answers

Jamb 2011 Biology Questions

Question 21:
Which of the following organs regulates the levels of water, salts , hydrogen ions and urea in the mammalian blood?
  • A Liver
  • B Kidney
  • C Bladder
  • D Colon
View Answer & Explanation
Question 22:
The sequence of the one-way gaseous exchange mechanism in a fish is
  • A Operculum → gills → mouth
  • B Gills → operculum → mouth
  • C Mouth → operculum → gils
  • D Mouth → gills → operculum
View Answer & Explanation
Question 23:
The type of asexual reproduction that is common to both Paramecium and protists is
  • A Budding
  • B Sporulation
  • C Fragmentation
  • D Fission
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Question 24:
In nature, plants and animals are perpetually engaged in mutualism because
  • A They are rivals
  • B All animals rely on food produced by plants
  • C They utilize respiratory wastes of each other
  • D They are neighbours
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Question 25:
In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is
  • A 16.7%
  • B 17.6%
  • C 26.7%
  • D 16.2%
View Answer & Explanation