1993 - JAMB Biology Past Questions and Answers - page 5
41
Carbon monoxide poisons tissue by
A
constricting the blood vessels
B
killing the cells
C
combining with haemoglobin
D
rupturing the blood vessels
correct option: c
Users' Answers & Comments42
Which of the following is an example of discontinuous variation observed in man?
A
Skin colours
B
Tongue rolling
C
Body weight
D
Height
correct option: b
Users' Answers & Comments43
During blood transfusion, agglutination may occur when
A
contrasting antigens reacts with contrasting antibodies
B
similar antigens react with similar antibodies
C
two different antigens react with each other
D
two different antibodies react with each other
correct option: a
Users' Answers & Comments44
In the illustration above, the genotypes of the offsprings are
A
1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
B
1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
C
2 homozygous smooth : 2 wrinkled
D
3 heterozygous smooth : 2 wrinkled
correct option: b
Users' Answers & Comments45
Cold blooded animals are referred to as
A
poikilothermic
B
homothermic
C
polythermic
D
homeostatic
correct option: a
Users' Answers & Comments46
Which of the following organisms has lost the pentadactyl limb structure?
A
Bat
B
Fish
C
Frog
D
Pigeon
correct option: c
Users' Answers & Comments47
Which of the following is the correct order of the developmental stages?
A
1->2->3->4->5
B
5->1->3->2->4
C
2->1->3->4->5
D
5->3->2->1->4
correct option: d
Users' Answers & Comments48
Stage 3 breathes
A
with the lungs
B
with the external gills
C
with the internal gills
D
through the skin
correct option: d
Users' Answers & Comments49
Blood is pumped into the right ventricle by the contraction of the auricle wall through
A
1
B
3
C
5
D
6
correct option: b
Users' Answers & Comments50
After circulation in the lungs, the blood returns to the left auricle through
A
1
B
4
C
5
D
6
correct option: d
Users' Answers & Comments