Which of the following pairs are fully adapted to terrestrial life?
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(D)
Flowering plants and conifers
3
Which of these animals is radially symmetrical?
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(B)
Hydra
4
Which of the following has cones?
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(B)
Gymnosperms
5
For effective functioning of a bird's quill feather, hooks fit on the ridge of the
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(C)
barbules
6
Which of the following is NOT true of spirogyra?
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(C)
Consist of branched filaments
7
Which of the following lacks chaetae, tentacles and antennae?
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(C)
Millipede
8
Incomplete metamorphosis occurs in the
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(B)
grasshopper
9
Fishes are cold blooded because their body temperature is
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(C)
dependent on that of their surroundings
10
When the original king and queen of termites die, they are replaced by
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(D)
developing nymphs nurtured as secondary reproductives
11
The male cockroach differs from the female by having
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(B)
a pair of style
12
The fins making up the limbs of the bony fish are
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(C)
pelvic and pectoral
13
The stem differs from the root in having the xylem and phloem strands
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(A)
on the same radii
14
Oxygen liberated during photosynthesis has been demonstrated to come from
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(C)
water
15
Which of these is a trace element?
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(B)
Copper
16
The main organic substances found in the human body are
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(C)
fat, carbohydrates and protein
17
Which of the following elements is essential for the formation of haemoglobin?
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(D)
Iron
18
The severe deficiency of vitamin C leads to
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(D)
scurvy
19
In addition to the high calories derived from fats and oils, they are
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(C)
used as insulators for cold
20
The extract from food substance reacting with sodium hydroxide and copper sulphate solutions will produce violet to purple coloration if
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(C)
protein is present
21
The three important organs that are situated close to the stomach are
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(D)
gall bladder, pancreas and spleen
22
Evidence that a tooth is a living part of the mammalian can be found within the
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(B)
pulp cavity
23
Blood circulation in a mammalian is said to be double because
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(A)
it passes twice through the heart in a complete circuit
24
Which is the correct order of water loss from the leaf? 1 Mesophyll 2 Veins 3 Substomatals cavity 4 Stomata
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(C)
2 → 1 → 3 → 4
25
The aperture between the left auricle and the left ventricle is guarded by the
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(D)
bicuspid valve
26
A major limitation in the use of the potometer for measuring the rate of transpiration is that
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(D)
the movement of the air buble in the potometer cannot be timed accurately
27
Which of the following statement is NOT correct with respect to inhalation in mammals? The
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(B)
diaphragm is raised
28
The equation that can be used to summarize the process of anaerobic breakdown of sugar is
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(D)
C6H12O6 2C2H5OH + 2CO2 + energy
29
If a person is bitten by a snake on the leg, it is advisable for him to
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(D)
Keep still and apply a tourniquet above the wound
30
Deamination occurs in the
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(D)
liver
31
In the mammalian skin, melanin and keratin are contained in the
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(D)
malpighian layer
32
Two main distinguishing features of the cervical vertebra are the presence of
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(A)
short neural spine and vertebraterial canal
33
Nastic movement is
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(B)
non-directional
34
Gestation in mammals is the period
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(C)
of development from zygote to birth
35
If a woman who is a carrier of sickle cell trait (AS) married a man who is a sickler (SS) and they had four children, how many of them would be normal?
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(D)
None
36
Which of the following is an example of discontinuous variation?
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(B)
left handedness
37
The hormones which regulates the amount of glucose in the blood is called
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(C)
insulin
38
An instrument that can be used to demonstrate phototropism and geotropism in plants is the
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(C)
klinostat
39
In an ecosystem, animals which feed directly on plants are called
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(B)
primary consumers
40
In an agricultural ecosystem, the biotic component consists of
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(A)
crop, pest and beneficial insects
41
Which of these disease CANNOT be prevented by immunization?
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(D)
onchocerciasis
42
Which of the following ecological factors are common to both terrestrial and aquatic habitats?
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(A)
Rainfall, temperature and light
43
In community, bacteria and fungi are referred to as
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(B)
decomposers
44
The swollen shoot disease of cocoa tree is caused by a
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(A)
virus
45
A larger percentage of tropical soils tends to be acidic because they
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(D)
lose lime and potash from the top soil through rain action
