In terms of the number of individuals, which of the following taxa is most inclusive?
คำตอบ
(C)
class
2
A characteristic that can possibly be shared by both living and non living organisms is
คำตอบ
(D)
increase in size
3
The cell of an onion bulb can be differentiated from a cheek cell by the presence of
คำตอบ
(C)
cell wall
4
In plants, the structure that performs a similar function with the testis in mammals is the
คำตอบ
(C)
anther
5
The bacteria type that are arranged in chains are the
คำตอบ
(C)
streptococci
6
The most abundant group of organisms in the animal kingdom is
คำตอบ
(D)
insecta
7
Radial symmetry is a feature common to
คำตอบ
(C)
coelenterates
8
Which of the following is used mainly for balancing in fish?
คำตอบ
(D)
the dorsal fin
9
The beak of a duck is structurally adapted for
คำตอบ
(A)
scooping and sieving food
10
The most important characteristic that makes reptiles to conquer terrestrial habitats is the possession of
คำตอบ
(D)
amniotic egg
11
In a dicotyledonous stem, the zone between the epidermis and the pericycle is the
คำตอบ
(A)
cortex
12
The order of passage of food in the digestive system is?
คำตอบ
(A)
ileum → caecum → large intestine → rectum
13
insectivorous plants traps and kill their prey to derive
คำตอบ
(C)
nitrogen
14
In the alimentary system of a bird, the function of teeth is carried out by the
คำตอบ
(C)
gizzard
15
What will happen when two equal-sized pieces of unripe pawpaw labeled X and Y are dropped into equal volumes of concentrated salt solution and distilled water respectively?
คำตอบ
(C)
pawpaw Y will become turgid
16
Exhaled air differs from inhaled air in that it
คำตอบ
(D)
usually has more water vapour
17
In the mammalian kidney, the Bowman''s capsules is located in the
คำตอบ
(C)
cortex
18
A plant parenchyma cell also acts as a supporting tissue when it
คำตอบ
(C)
becomes turgid
19
During ovulation, an egg is released from the
คำตอบ
(C)
graafian follicle
20
The transmission of impulses along a nerve fibre is characterized by
คำตอบ
(B)
electrical and ionic changes
21
The major consequences of bush burning in an ecosystem is
คำตอบ
(B)
the loss of biological diversity
22
Which of the following associations is an example of mutualism
คำตอบ
(A)
hydra viridis and zoochlorellae
23
In a typical freshwater habitat, the edge of the stream or pond constitutes the
คำตอบ
(C)
littoral zone
24
The main ecological problem facing intertidal organisms is
คำตอบ
(A)
desiccation
25
Stomata of some plants are sunken and protected by hairs. These are features of
คำตอบ
(D)
xerophytes
26
An ecological factor that will have the most limiting effects on the abundance of phytoplankton in a turbid pond is
คำตอบ
(C)
light
27
In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is
คำตอบ
(C)
14.28%
28
A boy who is fond of swimming in a pond finds himself passing urine with traces of blood. He is likely to have contacted
คำตอบ
(A)
schistosomiasis
29
The easiest way to establish the level of pollution in a local stream is to measure the level of
คำตอบ
(A)
oxygen
30
The Rhesus factor of blood was first identified in a category of
คำตอบ
(A)
monkeys
31
Genetically modified food products have not become universally accepted because
คำตอบ
(C)
their effects on human consumers is not yet fully understood
32
A major adaptive feature of endoparasites is the
คำตอบ
(A)
loss of the organ of movement
33
The ability of a chameleon to change its colour is an adaptive feature for
คำตอบ
(B)
defence
34
Which of the following is the most advanced evolutionary development in plants?
คำตอบ
(B)
development of flowers
35
Which of the following is a major cause of variation among organisms?
คำตอบ
(C)
Sexual reproduction
36
Use the diagram above to answer this question. Which of the organisms is characterised by the possession of a chitinous exoskeleton?
คำตอบ
(A)
l
37
Use the diagram above to answer this question.The type of reproduction illustrated in IV is
คำตอบ
(D)
budding
38
Use the diagram above to answer this question.The vessel that carries blood from l to ll is the
คำตอบ
(A)
pulmonary artery
39
Use the diagram above to answer this question.Water reabsorption takes place in
คำตอบ
(B)
lll and lV
40
Use the diagram above to answer this question. From the graph above, it can be appropriately deduced that?
คำตอบ
(B)
the body temperature in l is independent of external temperature
41
Use the diagram above to answer this question. The animal represented by l is a
คำตอบ
(B)
homoiotherm
42
In the diagram, the illustration is a typical example of a plant pollinated by
คำตอบ
(A)
wind
43
In the diagram, the part labelled I represents the
คำตอบ
(B)
lag phase
44
In the diagram, the part labelled IV indicated that the yeast population has
คำตอบ
(A)
reached its maximum size
45
In the diagram, if species i, ii and iii interact in a community, which of the following statement is true?
