Biology 2009 | Study Mode

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Question 21
A
nature of substratum
B
high salinity
C
high temperature
D
low pH
Explanation

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Correct option: A
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Question 22
A
northern guinea savanna
B
sounthern guinea savanna
C
tropical desert
D
montane forest
Explanation

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Correct option: C
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Question 23
A
20%
B
25%
C
40%
D
50%
Explanation

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Correct option: D
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Question 24
A
I and II only
B
II, III and IV
C
I, II and III
D
II and IV
Explanation

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Correct option: C
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Question 25
A
burning of fossil fuel
B
construction of dams
C
use of electricity
D
exploration of space
Explanation

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Correct option: A
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Question 26
A
evolution
B
variation
C
adaptation
D
mutation
Explanation

In any habitat, it is possible to observe the special adaptations of the organisms in it, which enable them to live their successfully and reproduce. This is unique to each specie.


Correct option: C
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Question 27
A
discontinuous variation
B
continuous variation
C
a mutant
D
a genome
Explanation

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Correct option: B
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Question 28
A
evolution
B
adaptation
C
variation
D
heredity
Explanation

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Correct option: D
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Question 29
A
centromeres
B
alleles
C
chromosomes
D
chromatids
Explanation

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Correct option: C
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Question 30
A
100%
B
75%
C
50%
D
25%
Explanation

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Correct option: C

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