2011 - JAMB Biology Past Questions and Answers - page 4

31
Habitats are generally classified into
A
biotic and abiotic
B
aquatic and terrestrial
C
aboreal and marine biomes
D
microhabitats and macrohabitats
correct option: b
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32
Drancunculiasis can be contacted through
A
eating contaminated food
B
drinking contaminated water
C
bathing in contaminated water
D
bites of blackfly
correct option: b
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33
Which of the following groups of environmental factors are density-dependent?
A
Food, salinity, accumulation of matabolites and light
B
Temperature, salinity predation and disease
C
Food predation, disease and accumulation of metabolites
D
Temperature food disease and light
correct option: c
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34
Millet , sorghum, maize and onions are common crops growth in Nigeria in the
A
tropical rainforests
B
sudan savanna
C
montane forests
D
sahel savanna
correct option: b
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35
In which of the following biomes is the south western part of Nigeria located?
A
Temperate forest
B
Tropical rainforest
C
Tropical woodland
D
Desert
correct option: b
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36
The inheritable characters that are determined by a gene located on the X-chromosome is
A
recessive
B
sex-linked
C
homozygous
D
dominant
correct option: b
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37
Lack of space in a population could lead to an increase in
A
water scarcity
B
birth rate
C
disease rate
D
dought
correct option: c
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38
If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of
A
codominance
B
incomplete dominance
C
mutation
D
linkage
correct option: b
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39
Which of the following theories was NOT considered by Darwin in his evolutionary theory?
A
Variation
B
Survival of the fittest
C
Use and disuse
D
Competition
correct option: c
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40
The crossing of individuals of the same species with different genetic characters is
A
cross breeding
B
polygenic inheritance
C
non-disjunction
D
inbreeding
correct option: d
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