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.
Preventing erosion could best be achieved by
crop rotation and mulching
contouring slopping ground and afforestation
grazing terracing and shifting cultivation
strip cropping and poaching
bush fallowing and crop rotation
Correct answer is B
No explanation has been provided for this answer.
Which of the following is not an effect of over-crowding in a population?
Death
Competition
Commensalism
Aggression
Cannibalism
Correct answer is B
Commensalism is a long-term biological interaction in which members of one species benefits while those of the other species neither benefit nor are harmed.
Hence, commensalism is not an effect of overcrowding.
Which of the following is not an outcome of ecological succession?
There is a progressive change in species structure, organic matter and energy flow
The climax stage consists of a comparatively long lasting species composition
There is no dynamic equilibrium between the community and habitat in the climax stage
Communities occurring later in the sequence of succession are more complex
There are fewer dominant species in the late stages of succession
Correct answer is A
No explanation has been provided for this answer.
An association between two organisms in which both benefit is called
parasitism
commensalism
symbiosis
Predation
competition
Correct answer is C
No explanation has been provided for this answer.
Which of these is not applicable to the circulation of water in nature?
Water removed from oceans are permanently lost
Water constantly evaporates from the seas, rivers, lakes, and soil
Water vapour rises. cools, condenses, and precipitates as rain and dew
Water is absorbed by plants and animals from their external environment
Plants lose water by transpiration and decay
Correct answer is A
No explanation has been provided for this answer.