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