2012 - JAMB Biology Past Questions & Answers - page 1

1
Which of the following is involved in secondary thickening in plants?
A
Collenchyma and xylem cells
B
Vascular cambium
C
Cork cambium and sclerenchyma
D
Vascular cambium and cork cambium
CORRECT OPTION: d
2
An example of a fruit that develops from a single carpel is
A
okro
B
tomato
C
bean
D
orange
CORRECT OPTION: c
3
Plant growth can be artificially stimulated by the addition of
A
gibberellin
B
kinin
C
abscisic acid
D
ethylene
CORRECT OPTION: a
4
The autonomic nervous system consists of neurons that control the
A
voluntary muscles
B
heart beat
C
tongue
D
hands
CORRECT OPTION: b
5
The water cycle is maintained mainly by
A
evaporation of water in the environment
B
evaporation and condensation of water in the environment
C
condensation of water in the environment
D
transpiration and respiration in plants
CORRECT OPTION: b
6
Plants of temperate origin can be grown in tropical areas in the vegetation zones of the
A
rain forest
B
guinea savanna
C
sudan savanna
D
montane forest
CORRECT OPTION: b
7
Organisms living in an estuarine habitat are adapted to
A
withstand wide fluctuations in temperature
B
survive only in water with low salinity
C
withstand wide fluctuations in salinity
D
feed only on phytoplankton and dead organic matter
CORRECT OPTION: c
8
The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the
A
tropical rainforest
B
mangrove swamps
C
gressland
D
montane forest
CORRECT OPTION: b
9
Which of the following animals can exist solely on the water they get from food and metabolic reactions?
A
forest arboreal dweller
B
Desert dwellers
C
forest-ground dweller
D
rainforest dwellers
CORRECT OPTION: b
10
The most likely first colonizers of a bare rock are
A
mosses
B
ferns
C
lichen
D
fungi
CORRECT OPTION: c
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