1997 - JAMB Biology Past Questions and Answers - page 4
31
The part of the brain that regulates most biological cycles in humans is
A
olfactory lobe
B
optic lobe
C
medulla oblongata
D
pineal body
32
The ability of the eye to focus on both near and distant objects is termed
A
image formation
B
refraction
C
hypermetropia
D
Accomodation
33
The speed of wind can be measured with an instrument called
A
hygrometer
B
secchi disc
C
anemometer
D
wind vane
34
A
Weevils
B
Rat
C
Hawk
D
Prayer mantis
35
Toads and lizards in an ecosystem depend on a limited quantity of food. This is an example of
A
parasitism
B
intraspecific competition
C
predation
D
interspecific competition
36
Adaptive features of plants to desert conditions include
A
thick barks, succulent stems and sunken stomata
B
thin barks, succulent stems and sunken stomata
C
thin barks, air floats on stems and sunken stomata
D
air spaces in tissues, adventitious roots and thick barks
37
The Southern Guinea Savanna differs from the Northern Guinea Savanna in that it has
A
lower rainfall and shorter grasses
B
less grasses and scattered trees
C
more rainfall and taller grasses
D
less arboreal and burrowing animals
38
After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is
A
Euglena → water lily → Spirogyra → grass
B
water lily → Spirogyra →grass → Euglena
C
Spirogyra → Euglena → grass → water lily
D
Euglena → Spirogyra → water lily → grass
39
In a soil sample, the relative amouunts of the different soil particles can best be determined by the process of
A
filtration
B
centrifugation
C
precipitation
D
sedimentation
40
Which is the most important pollutant of the marine environment in Nigeria?
A
Insecticides
B
Sewage
C
Oil
D
Inorganic fertilizers
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