2011 - JAMB Biology Past Questions and Answers - page 3
21
The sequence of the one-way gaseous exchange mechanism in a fish is
A
operculum → gills → mouth
B
gills → operculum → mouth
C
mouth → operculum → gils
D
mouth → gills → operculum
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22
The type of asexual reproduction that is common to both Paramecium and protists is
A
budding
B
sporulation
C
fragmentation
D
fission
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23
In nature, plants and animals are perpetually engaged in mutualism because
A
they are rivals
B
all animals rely on food produced by plants
C
they utilize respiratory wastes of each other
D
they are neighbours
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24
In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is
A
16.7%
B
17.6%
C
26.7%
D
16.2%
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25
An example of a filter -feeding animal is
A
shark
B
butterfly
C
whale
D
mosquito
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26
Which of the following is a feature of the population pyramid of a developing country?
A
long lifespan
B
low birth rate
C
low death rate
D
short lifespan
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27
The interaction of a community of organisms with its abiotic environment constitutes
A
niche
B
a food chain
C
an ecosystem
D
a mirohabitat
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28
The vector of the malaria parasite is
A
female Aedes mosquito
B
female Anophelous mosquito
C
male Culex mosquito
D
female Culex mosquito
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29
Which of the following instruments is used to measure relative humidity?
A
Hydrometer
B
Thermometer
C
Hygrometer
D
Anemometer
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30
Exo-erythrocytic phase of the life cycle of malaria parasite occurs in the
A
liver of humans
B
reticuloendothelial cells of humans
C
Malphigian tubules of mosquito
D
brain of humans
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