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