2001 - JAMB Biology Past Questions and Answers - page 3
21
A
fenestra ovalis
B
middle ear canal
C
internal auditrory meatus
D
ear ossicles
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22
When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is
A
galactose
B
starch
C
sucrose
D
glucose
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23
A
caudal vertebra
B
lumbar vertebra
C
thoracic vertebra
D
cervical vertebra
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24
A
III
B
II
C
V
D
IV
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25
Salts and water are absorbed in the roots and transported to leaves by
A
diffusion through the xylem tissues
B
osmosis through the phloem tissues
C
diffusion through the phloem tissues
D
osmosis through the xylem tissues
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26
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
A
35%
B
16%
C
46%
D
23%
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27
Carbon (IV) oxide content of the atmosphere is least affected by
A
cutting down and clearing of forests
B
forest fires
C
burning of fossil fuels
D
plant and animal respiration
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28
The factor that least affects food shortages in sub-saharan Africa is
A
flooding
B
pests
C
mixed-cropping
D
drought
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29
The epiphytic habitat can best be described as
A
arboreal
B
estaurine
C
aquatic
D
terrestrial
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30
The highest percentage of energy in an ecosystem occurs at the level of the
A
secondary consumer
B
decomposers
C
producers
D
primary consumers
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