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Saturday, 15 August 2026
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Biology Past Questions and Answers

Topic: Mineral requirements

Jamb Biology Questions - Mineral requirements

Question 6:
The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with
  • A Denitrifying bacteria
  • B Saprophytic bacteria
  • C Rhizobium
  • D Nitrosomonas
View Answer & Explanation
Question 7:
Night-blindness result from a deficiency of
  • A Vitamin E
  • B Vitamin A
  • C Vitamin K
  • D Vitamin C
View Answer & Explanation
Question 8:
Night-blindness result from a deficiency of
  • A Vitamin E
  • B Vitamin A
  • C Vitamin K
  • D Vitamin C
View Answer & Explanation
Question 9:
Mycorrhizae promote plant growth by
  • A Absorbing inorganic ions from the soil
  • B Protecting it from infection
  • C Helping it to utilize atmospheric nitrogen
  • D Serving as a growth regulator
View Answer & Explanation
Question 10:
Plant growth can be artificially stimulated by the addition of
  • A Gibberellin
  • B Kinin
  • C Abscisic acid
  • D Ethylene
View Answer & Explanation