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Biology Past Questions and Answers

Jamb 1986 Biology Questions

Question 46:
A larger percentage of tropical soils tends to be acidic because they
  • A Contain large quantities of potash
  • B Contain large quantities of lime
  • C Lose a high proportion of their organic matter to running water
  • D Lose lime and potash from the top soil through rain action
View Answer & Explanation
Question 47:
The following are methods of soil conservation EXCEPT
  • A Contour terracing
  • B Strip cropping
  • C Contour ploughing
  • D Mixed grazing
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Question 48:
Sample of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool, if these tubes are suspended in a trough of water, water will rise highest after a few hours in
  • A Sand
  • B Loamy
  • C Clay
  • D Humus
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Question 49:
Which of the labelled parts will develop into a new maize plant?
  • A 2
  • B 3
  • C 4
  • D 5
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Question 50:
The structure labelled 1 is the
  • A Plumule
  • B Radicle
  • C Cell membrane
  • D Seed coat
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