Search SchoolNGR

Saturday, 23 May 2026
Register . Login

Biology Past Questions and Answers

Jamb 1985 Biology Questions

Question 46:
Water retention is highest in soils which are rich in
  • A Sand, poor in humus and devoid of clay
  • B Clay and sand, but poor in humus
  • C Clay and humus, but poor in sand
  • D Clay, poor in humus and devoid of sand
  • E Sand and humus, but poor in clay
View Answer & Explanation
Question 47:
The origin of mineral particles in the soil is
  • A Humus
  • B Water
  • C Micro-organisms
  • D Weathered rock
  • E Organic matter
View Answer & Explanation
Question 48:
Atmospheric nitrogen is directly replenished in nature through
  • A The activities of denitrifying bacteria
  • B The breakdown of ammonium salts in the soil
  • C The activities of nitrifying bacteria
  • D The activities of nitrogen-fixing bacteria in root nodules
  • E Egestion, death and decay
View Answer & Explanation
Question 49:
The initial volume of water poured into 60g bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil is therefore
  • A 46.7
  • B 25.0
  • C 20.0
  • D 30.0
  • E 58.3
View Answer & Explanation
Question 50:
Bowman's capsule are located in the part labelled
  • A 1
  • B 2
  • C 3
  • D 4
  • E 5
View Answer & Explanation