Which of the following structures is responsible for osmoregulation?
Trả lời
(B)
II
2
Excretion is carried out through the structure labelled
Trả lời
(C)
IV
3
The part labelled II is made up of
Trả lời
(B)
contractile vacuole
4
The correct sequence of the levels in an increasing order of complexity is
Trả lời
(B)
lll, I, l\/, ll
5
Which of the following organelles is used for locomotion in Paramecium?
Trả lời
(C)
Cilium
6
Which of the following is not true of the nucleus of a living cell? It contains
Trả lời
(E)
ribosomes
7
The cell membrane consists of
Trả lời
(C)
lipids and proteins
8
Which of the following is not likely to be found in the cell of a ripe tomato fruit?
Trả lời
(B)
Chlorophyll
9
Which of the following constitutes the main internal tissue of a leaf?
Trả lời
(B)
Mesophyll
10
Four cells with osmotic potential equivalent to that of 3% salt solution were immersed respectively in solutions
of different concentrations labeled as follows: I = 4% salt solution; II = 6% salt solution III = 1% salt solution;
IV = 10% salt solution; V = 5% salt solution. Which of the solutions will cause an increase in osmotic
pressure within the cell?
Trả lời
(C)
III
11
Which of the following statements is not true of osmotic process?
Trả lời
(E)
. The two solutions are of equal concentration at the beginning of experiment.
12
Which of the following is the correct route for the movement of materials through the kidney?
Which of the following is the function of the hormone in the lslets of Langerhans?
Trả lời
(C)
aids the rate at which glucose is converted to glycogen
14
Blood in mammals transports oxygen because it contains the pigment called
Trả lời
(A)
haemoglobin
15
In which of the following is cilia not associated with movement or transport of materials?
Trả lời
(D)
Mammalian alimentary canal
16
The pilaferous layers is labelled
Trả lời
(A)
I
17
The xylem is labelled
Trả lời
(C)
V
18
The part through which manufactured sugar is transported is labeled
Trả lời
(D)
VII
19
The loss of water vapour through the aerial parts of the plant to the atmosphere is called
Trả lời
(D)
transpiration
20
The upward movement of the sap in the xylem vessel is brought about by
Trả lời
(C)
capillarity
21
The piece of bone represented in the diagram is found in the
Trả lời
(A)
pelvic region
22
The part labelled I is the
Trả lời
(C)
ilium
23
The bone that articulates with the part labelled III is the
Trả lời
(B)
femur
24
Which of the following organisms is at the tissue level of organization?
Trả lời
(D)
Hydra
25
The light - sensitive layer is labelled
Trả lời
(E)
VII
26
The greatest concentration of light receptors is found in the part labelled
Trả lời
(B)
V
27
The aqueous humour is represented by the part labelled
Trả lời
(B)
II
28
Autotrophs are also described as
Trả lời
(D)
producers
29
In photosynthesis, the following processes are part of the light reaction
except
Trả lời
(D)
formation of glucose using energy from NADPH
30
Which of the following is not an adaptation of the small intestine for absorption of digested food? The
Trả lời
(E)
small intestine leads into the large intestine
31
A dehiscent fruit formed from several fused carpels with many seeds is classified as
Trả lời
(B)
a capsule
32
The translocation of food materials in plants takes place in the
Trả lời
(C)
phloem
33
An association between living organisms in which one lives on and feeds at the expense of the other
organism is known as
Trả lời
(A)
parasitism
34
Which of the following statements is not correct about food chains?
Trả lời
(D)
There is no energy loss in a food chain
35
Which of the following characteristics is associated with commensalism?
Trả lời
(C)
The association is beneficial to one of the organisms
36
Which of the following statements is not correct about the ecological effects of agricultural activities?
Trả lời
(E)
Monocropping is one of the cultural methods of controlling pests.
37
Pests can be controlled without the subsequent danger of polluting the ecosystem by
Trả lời
(B)
increasing the population of the natural enemies of the pest
38
The activities of an organism which affect the survival of another organism in a habitat can be described as
Trả lời
(A)
biotic factors
39
Which of the following. groups of organisms feeds directly on green plants?
Trả lời
(C)
Primary consumer
40
Which of the following methods is used in food preservation for a long period?
Trả lời
(E)
Salting and drying the food
41
Maize is best stored against insect attack
Trả lời
(B)
in fumigated silos
42
Which of the following is not an effect of overcrowding on a population?
Trả lời
(C)
Commensalism
43
The term used in describing the effective management of national resources by man is
Trả lời
(E)
conservation
44
Breathing roots are characteristic structures of plants growing in
Trả lời
(A)
mangrove swamp
45
At which of the following stages of cell division can the cell be said to be resting
Trả lời
(D)
interphase
46
Which of the following represents the phenotypic ratio, when a plant Rr is crossed with another plant Rr,
assuming that the gene R for round seed is dominant and wrinkled r is recessive?
Trả lời
(D)
3:1
47
All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of
Trả lời
(A)
mitosis
48
What stage is illustrated by the diagram?
Trả lời
(C)
Metaphase
49
What is the name given to the structure labelled A at this stage of cell division
Trả lời
(B)
Centrtomere
50
The evidence for evolution can be obtained from the following except
Trả lời
(C)
history
51
The similarity between the bone structure of the arm of a human and the fore-limb of a
rabbit indicates
Trả lời
(C)
a common origin
52
What phenomenon in ecosystem does the diagram illustrate?
Trả lời
(C)
Pyramid of energy
53
Which of the following effects would desertification have on the
ecological balance represented in the diagram above? The calorific
value' of the energy
Trả lời
(C)
6 x 104k cal obtained at level I would increase
54
One of the methods of preventing measles is by
Trả lời
(D)
vaccinating young children
55
Group instinct or social behaviour is not displayed in
Trả lời
(C)
chickens
56
Which of the following fixes atmospheric nitrogen?
Trả lời
(A)
Rhizobium
57
The spaces between neutrones through which impulses cross by means of chemical reaction are called
Trả lời
(C)
synapses
58
The inability of some individuals to perceive the taste of some substances is an example of
Trả lời
(B)
physiological variation
59
The term afforestation is used in describing
Trả lời
(B)
planting trees of value to man
60
Over-crowding in seedlings of different species is less serious than over-crowding involving one species
because different species may
Trả lời
(A)
have different nutritional needs
61
The autonomic nervous system comprises
Trả lời
(A)
sympathetic and parasympathetic systems
62
The scientist who discovered the honey-comb structure of the cell was
Trả lời
(A)
Robert Hooke
63
Which of the following organelles are likely to be present in cells that are actively respiring and
hotosynthesizing?
Trả lời
(D)
Chloroplasts and mitochondria
64
Which of the following is not true about a bacterial colony growing on an agar plate?
Trả lời
(C)
Different colonies have different colours
65
The theory that new organs or characteristics develop in organisms when there is a need for them was
postulated by
