2009 - JAMB Biology Past Questions and Answers - page 3
21
In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is
A
nature of substratum
B
high salinity
C
high temperature
D
low pH
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22
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants?
A
northern guinea savanna
B
sounthern guinea savanna
C
tropical desert
D
montane forest
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23
Mass of crucible = 10g
Mass of crucible and soil before heating = 29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?
Mass of crucible and soil before heating = 29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?
A
20%
B
25%
C
40%
D
50%
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24
I. Onchocerciasis
II. Schistosomiasis
III.Salmonellosis
IV. Meningitis
which of the diseases listed above are associated with water?
II. Schistosomiasis
III.Salmonellosis
IV. Meningitis
which of the diseases listed above are associated with water?
A
I and II only
B
II, III and IV
C
I, II and III
D
II and IV
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25
The major cause of global warning is the
A
burning of fossil fuel
B
construction of dams
C
use of electricity
D
exploration of space
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26
The uniqueness of an individual organism in a population is accounted for by
A
evolution
B
variation
C
adaptation
D
mutation
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27
A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as
A
discontinuous variation
B
continuous variation
C
a mutant
D
a genome
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28
A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of
A
evolution
B
adaptation
C
variation
D
heredity
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29
In Mendelian inheritance, discontinuous characters are controlled by the
A
centromeres
B
alleles
C
chromosomes
D
chromatids
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30
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller?
A
100%
B
75%
C
50%
D
25%
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