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