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Tuesday, 07 July 2026
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Biology Past Questions and Answers

Jamb 2001 Biology Questions

Question 26:
Salts and water are absorbed in the roots and transported to leaves by
  • A Diffusion through the xylem tissues
  • B Osmosis through the phloem tissues
  • C Diffusion through the phloem tissues
  • D Osmosis through the xylem tissues
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Question 27:
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
  • A 35%
  • B 16%
  • C 46%
  • D 23%
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Question 28:
Carbon (IV) oxide content of the atmosphere is least affected by
  • A Cutting down and clearing of forests
  • B Forest fires
  • C Burning of fossil fuels
  • D Plant and animal respiration
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Question 29:
The factor that least affects food shortages in sub-saharan Africa is
  • A Flooding
  • B Pests
  • C Mixed-cropping
  • D Drought
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Question 30:
The epiphytic habitat can best be described as
  • A Arboreal
  • B Estaurine
  • C Aquatic
  • D Terrestrial
View Answer & Explanation