How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Washing away of humus from the soil surface
reducing of soil aeration by pressure
soil erosion by means other than rainfall
loss of organic matter due to exposure to direct sunlight
washing out chalk and limestone from upper layers of by heavy rains
Correct answer is A
No explanation has been provided for this answer.
Denitrifying bacteria in nature liberate gaseous nitrogen directly from
ammonium salts
soil nitrates
thunderstorms
soil nitrites
plant and animal proteins
Correct answer is B
No explanation has been provided for this answer.
humus, clay, silt, sand, stones
humus, silt, clay, sand, stones
humus, clay,silt, stones, sand
humus, sand, silt, clay, stones
clay, humus, silt, sand, stones
Correct answer is A
No explanation has been provided for this answer.
Erosion can be reduced along shape by
ridging across slope
ridging up slope
ridging down slope
crop rotation
bush fallowing system
Correct answer is A
No explanation has been provided for this answer.
The structure labelled 5 is the
sweat gland
sebaceous gland
blood vessel
nerve fibre
Correct answer is A
No explanation has been provided for this answer.