1995 - WAEC Biology Past Questions and Answers - page 5
41
An association between two organisms in which both benefit is called
A
parasitism
B
commensalism
C
symbiosis
D
Predation
correct option: c
Users' Answers & Comments42
Which of the following is not an outcome of ecological succession?
A
There is a progressive change in species structure, organic matter and energy flow
B
The climax stage consists of a comparatively long lasting species composition
C
There is no dynamic equilibrium between the community and habitat in the climax stage
D
Communities occurring later in the sequence of succession are more complex
correct option: a
Users' Answers & Comments43
Which of the following is not an effect of over-crowding on a population?
A
Death
B
Competition
C
Commensation
D
Aggression
correct option: a
Users' Answers & Comments44
The diagram above represent the shape of major group of bacteria
The groups staphylococci and streptobacilli are represented by
A
I and II
B
II and IV
C
III and VII
D
IV and VII
correct option: d
Users' Answers & Comments45
Prevention of erosion could best be carried out by
A
crop rotation and mulching
B
contouring of slopping ground and afforestation
C
grazing terracing and shifting cultivation
D
strip cropping and poaching
correct option: b
Users' Answers & Comments46
The following are useful measures for conserving forest except
A
preventing and controlling accidental forest fire
B
encouraging the use of charcoal for industrial and domestic purposes
C
combating and preventing plant diseases
D
reafforestation of depleted forest
correct option: b
Users' Answers & Comments47
The following practices are aimed at soil conservation except
A
contour ridging
B
application of manures
C
strip cropping
D
bush clearing
correct option: d
Users' Answers & Comments48
Which of the following natural resources is most readily available to all organisms?
A
Water
B
Oil
C
Food
D
Air
correct option: d
Users' Answers & Comments49
Which of the following is an example of discontinuous variation?
A
Height
B
Size of head
C
Blood group
D
Skin colour
correct option: c
Users' Answers & Comments50
Hereditary variation is best described as
A
characters transmitted from generation to generation
B
traits acquired from diseases
C
characters that show up due to social conditions
D
traits acquired from habits and environmental conditions
correct option: a
Users' Answers & Comments