Which of the following structures is responsible for osmoregulation?
Απάντηση
(B)
II
2
Excretion is carried out through the structure labelled
Απάντηση
(C)
IV
3
The part labelled II is made up of
Απάντηση
(B)
contractile vacuole
4
The correct sequence of the levels in an increasing order of complexity is
Απάντηση
(B)
lll, I, l\/, ll
5
Which of the following organelles is used for locomotion in Paramecium?
Απάντηση
(C)
Cilium
6
Which of the following is not true of the nucleus of a living cell? It contains
Απάντηση
(E)
ribosomes
7
The cell membrane consists of
Απάντηση
(C)
lipids and proteins
8
Which of the following is not likely to be found in the cell of a ripe tomato fruit?
Απάντηση
(B)
Chlorophyll
9
Which of the following constitutes the main internal tissue of a leaf?
Απάντηση
(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?
Απάντηση
(C)
III
11
Which of the following statements is not true of osmotic process?
Απάντηση
(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?
Απάντηση
(C)
aids the rate at which glucose is converted to glycogen
14
Blood in mammals transports oxygen because it contains the pigment called
Απάντηση
(A)
haemoglobin
15
In which of the following is cilia not associated with movement or transport of materials?
Απάντηση
(D)
Mammalian alimentary canal
16
The pilaferous layers is labelled
Απάντηση
(A)
I
17
The xylem is labelled
Απάντηση
(C)
V
18
The part through which manufactured sugar is transported is labeled
Απάντηση
(D)
VII
19
The loss of water vapour through the aerial parts of the plant to the atmosphere is called
Απάντηση
(D)
transpiration
20
The upward movement of the sap in the xylem vessel is brought about by
Απάντηση
(C)
capillarity
21
The piece of bone represented in the diagram is found in the
Απάντηση
(A)
pelvic region
22
The part labelled I is the
Απάντηση
(C)
ilium
23
The bone that articulates with the part labelled III is the
Απάντηση
(B)
femur
24
Which of the following organisms is at the tissue level of organization?
Απάντηση
(D)
Hydra
25
The light - sensitive layer is labelled
Απάντηση
(E)
VII
26
The greatest concentration of light receptors is found in the part labelled
Απάντηση
(B)
V
27
The aqueous humour is represented by the part labelled
Απάντηση
(B)
II
28
Autotrophs are also described as
Απάντηση
(D)
producers
29
In photosynthesis, the following processes are part of the light reaction
except
Απάντηση
(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
Απάντηση
(E)
small intestine leads into the large intestine
31
A dehiscent fruit formed from several fused carpels with many seeds is classified as
Απάντηση
(B)
a capsule
32
The translocation of food materials in plants takes place in the
Απάντηση
(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
Απάντηση
(A)
parasitism
34
Which of the following statements is not correct about food chains?
Απάντηση
(D)
There is no energy loss in a food chain
35
Which of the following characteristics is associated with commensalism?
Απάντηση
(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?
Απάντηση
(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
Απάντηση
(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
Απάντηση
(A)
biotic factors
39
Which of the following. groups of organisms feeds directly on green plants?
Απάντηση
(C)
Primary consumer
40
Which of the following methods is used in food preservation for a long period?
Απάντηση
(E)
Salting and drying the food
41
Maize is best stored against insect attack
Απάντηση
(B)
in fumigated silos
42
Which of the following is not an effect of overcrowding on a population?
Απάντηση
(C)
Commensalism
43
The term used in describing the effective management of national resources by man is
Απάντηση
(E)
conservation
44
Breathing roots are characteristic structures of plants growing in
Απάντηση
(A)
mangrove swamp
45
At which of the following stages of cell division can the cell be said to be resting
Απάντηση
(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?
Απάντηση
(D)
3:1
47
All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of
Απάντηση
(A)
mitosis
48
What stage is illustrated by the diagram?
Απάντηση
(C)
Metaphase
49
What is the name given to the structure labelled A at this stage of cell division
Απάντηση
(B)
Centrtomere
50
The evidence for evolution can be obtained from the following except
Απάντηση
(C)
history
51
The similarity between the bone structure of the arm of a human and the fore-limb of a
rabbit indicates
Απάντηση
(C)
a common origin
52
What phenomenon in ecosystem does the diagram illustrate?
Απάντηση
(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
Απάντηση
(C)
6 x 104k cal obtained at level I would increase
54
One of the methods of preventing measles is by
Απάντηση
(D)
vaccinating young children
55
Group instinct or social behaviour is not displayed in
Απάντηση
(C)
chickens
56
Which of the following fixes atmospheric nitrogen?
Απάντηση
(A)
Rhizobium
57
The spaces between neutrones through which impulses cross by means of chemical reaction are called
Απάντηση
(C)
synapses
58
The inability of some individuals to perceive the taste of some substances is an example of
Απάντηση
(B)
physiological variation
59
The term afforestation is used in describing
Απάντηση
(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
Απάντηση
(A)
have different nutritional needs
61
The autonomic nervous system comprises
Απάντηση
(A)
sympathetic and parasympathetic systems
62
The scientist who discovered the honey-comb structure of the cell was
Απάντηση
(A)
Robert Hooke
63
Which of the following organelles are likely to be present in cells that are actively respiring and
hotosynthesizing?
Απάντηση
(D)
Chloroplasts and mitochondria
64
Which of the following is not true about a bacterial colony growing on an agar plate?
Απάντηση
(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
