Which of the following does a virus have in common with animal cells?
คำตอบ
(B)
DNA
2
Which of the following organelles are likely to be present in cells that are actively respiring and photosynthesizing?
คำตอบ
(B)
Mitochondria and chloroplast
3
One common characteristic of fungi, algae, mosses and ferns is that they
คำตอบ
(C)
produce spores that are dispersed
4
Protein-like bodies are borne on the part labelled
คำตอบ
(A)
II
5
The sexual reproductive function is performed by the part labelled
คำตอบ
(D)
V
6
Which of the following is transmitted through mosquito bite?
คำตอบ
(A)
Filariasis
7
Which of the following insects lays its eggs in horny, purse-like cases?
คำตอบ
(D)
Cockroach
8
Which of the following vertebrates does the skin function as a respiratory surface?
คำตอบ
(D)
Frog
9
Birds maintain their body temperature with the help of their
คำตอบ
(B)
feathers which cover the body
10
Secondary thickening in dicotyledonous stem is controlled by the
คำตอบ
(C)
cambium
11
2H2 → 2H2 + O2(g). The equation above represents a part of the light stage of photosynthesis. Which of the following must be presents for this reaction to occur?
คำตอบ
(C)
Light energy and cholorphyll
12
In an experiment to investigate the effect of nitrogen on the growth of plants, the substrate should be a medium of
คำตอบ
(C)
cow dung
13
Which vitamin plays an important role in blood clotting?
คำตอบ
(B)
Vitamin K
14
The mammalian organ which acts both as a digestive and as an endocrine organ is the
คำตอบ
(C)
pancreas
15
Which of following is NOT involved in the transport of substance in the body?
คำตอบ
(C)
Leucocytes
16
The end product of glycolysis in plants and animals is
คำตอบ
(A)
pyruvic acid
17
During respiration, air circulates round plant tissues via the
คำตอบ
(D)
intercellular spaces
18
The excretory structure in the earthworm is the
คำตอบ
(C)
nephridium
19
During the bending of the arm, the biceps muscles
คำตอบ
(A)
contracts and the triceps muscles relaxes
20
When a healthy shoot of a flowering plant is illuminated from one side, auxins, accumulate on the
คำตอบ
(A)
non-illuminated side of the shoot
21
The type of placentaion shown is
คำตอบ
(C)
parietal
22
An example of a plant having the placentation shown is
คำตอบ
(D)
pride of Barbados
23
The term caryopsis is used to describe a fruit in which the
คำตอบ
(C)
testa and pericarp are fused
24
The sex of a foetus is determined during
คำตอบ
(C)
fertilization
25
Biological growth refers strictly to an increase in the
คำตอบ
(A)
protoplasm of an organism
26
The process of walking is under the control of the part of the brain called
คำตอบ
(C)
cerebellum
27
The gland directly affecting metabolic rate, growth and development is known as
คำตอบ
(B)
thyroid gland
28
Which of the following ions is involved in the conduction of the nerve impulse?
คำตอบ
(B)
K+
29
The depth of illumination in a water body can be measured with a
คำตอบ
(B)
secchi disc
30
In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the
คำตอบ
(D)
secondary consumer gets only a small portion of the energy contained in the primary producer
31
In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
คำตอบ
(B)
it is produced during respiration of animals
32
In a tropical rain forest, non-epiphytic ferns and allies occur as
คำตอบ
(C)
shade-loving species
33
Colonization of a bare rock surface is termed
คำตอบ
(C)
primary succession
34
Which of the following is a measure for the control of bilharzia?
คำตอบ
(B)
Application of molluscicides in water bodies
35
Some of the diseases caused by bacteria are
คำตอบ
(A)
tuberculosis, gonorrhoea and syphilis
36
Environmental pollutants which can work through the media of water, soil and air include
คำตอบ
(C)
sulphur(IV)oxide
37
Human height is an example of a feature which depends on both
คำตอบ
(B)
genetic and environmental factors
38
A person with type O blood can donate to a patient with type A because the donor's blood
คำตอบ
(A)
lacks antigens
39
The DNA molecule is a chain of repeating
คำตอบ
(D)
nucleotides
40
The specific number of chromosomes in each somatic cell is represented by
คำตอบ
(C)
2N
41
A man with blood group a is married to a woman with blood group A. Which of the following group combinations is possible if the family has three children?
คำตอบ
(D)
A, O, A
42
The F1 of a cross between a tall and a dwarf plant was tall. The F1 was advanced to F2. How many of 120F2 plants will be dwarf?
คำตอบ
(A)
30
43
All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because
คำตอบ
(D)
sex-linked traits express dominance in females
44
The slender, long and slightly curved beak of the sun-bird is an adaptation for breeding for feeding on
