In the binomial system of naming organisms, the second name is called the
Trả lời
(D)
specific name
2
Which of the following features does not necessarily place paramecium as a higher level of organisation over Amoeba?
Trả lời
(A)
Presence of cilia
3
The living materials of the cell consist of
Trả lời
(A)
nucleus and cytoplasm
4
A pupil accidentally "watered" a potted plant with concentrated salt solution after sometime the plant began to wilt.
The wilting of the plant is due to the fact that
Trả lời
(C)
the salt solution has caused water lost from the plant cell leading to loss of turgor
5
A pupil accidentally "watered" a potted plant with a concentrated salt solution. After sometime the plant began to wilt.
Which of the following activities would revive the plant?
Trả lời
(D)
Adding more water to the soil
6
Primary growth in plants is brought about by the activity of the
Trả lời
(A)
meristem
7
To form a ball and socket joint, the structure labeled I fits into another structure in the scapula
called the
Trả lời
(B)
glenoid cavity
8
The structure labelled II is called
Trả lời
(C)
shaft
9
Which of the following parts of the skeleton does not have a protective function?
Trả lời
(B)
Carpals
10
Carbon dioxide is carried in the plasma?
Trả lời
(A)
in combination with haemoglobin
11
In the adult frog gaseous exchange takes place in the
Trả lời
(A)
buccal cavity, skin and lungs
12
The process of regulating the amount of water and solutes in the body fluids is called
Trả lời
(C)
osmoregulation
13
The presence of glucose in the urine of a patent is an indication of malfunctioning of the
Trả lời
(A)
pancreas
14
Which of the following statements is not true about hormones?
Trả lời
(D)
Once the effects of hormones are over, they are inactivated and excreted from the body
15
Which of the following actions is note function of adrenaline? It increases
Trả lời
(B)
muscular power and resistance to fatigue
16
Plant hormones include the following except
Trả lời
(A)
insulin
17
The passage of nerve impulse across a synapse is facilitated by the secretion of
Trả lời
(A)
acetylcholine
18
The part of the brain which controls and coordinates body posture is the
Trả lời
(A)
cerebellum
19
Which of the following processes is not an example of a reflex ac ion?
Trả lời
(B)
Reading
20
The eyes can properly focus images of objects of various distances on the retina by a process called
Trả lời
(C)
accommodation
21
The process by which flowers produce fruit without the process of fertilization is called
Trả lời
(B)
parthenocarpy
22
The part of the young root that pushes its way through the soil is the
Trả lời
(C)
root cap
23
An example of a dehiscent fruit is
Trả lời
(A)
crotolaria
24
Which of the following food substances gives the least amount of calories?
Trả lời
(C)
cabbage
25
Analysis of the gut content of an animal showed that it contained small pieces of bone, seeds. roughages and insects. The animal is likely to be a/an.
Trả lời
(D)
omnivore
26
Filaments of Spirogyra placed in a beaker of water in a dark cupboard died because
Trả lời
(A)
the filaments could not photosynthesize
27
The impedance of the concentration of chloroplast in the palisade layer of the leaf is for maximum exposure to
Trả lời
(B)
light
28
A community is best described as
Trả lời
(C)
populations of different species living together and interacting with each other in one habitat
29
Which of the following physical actors is likely to affect the distribution of plants in a pond?
Trả lời
(A)
light
30
Which of the following instruments is used to measure wind speed?
Trả lời
(D)
Anemometer
31
Tertiary consumers within the web are
Trả lời
(A)
cat and lion only
32
What would be the effect of taking the lion out of the web?
Trả lời
(B)
Man would occupy the apex of the web
33
Which of the following statements about the transfer of energy in the ecosystem is correct?
Trả lời
(D)
Energy is lost at each trophic level
34
Pond weeds normally lack thick layers of cuticle because
Trả lời
(B)
there is no danger of becoming desiccated
35
Shrubs do not survive on newly weathered soils because
Trả lời
(A)
the top soil is shallow
36
The speed of the flow of water in a river is faster in the middle than along the banks due to
Trả lời
(D)
resistance offered by the wall of the banks.
37
The effects of environmental degradation caused by human activities can be controlled by the following measures except
Trả lời
(C)
resettling indigenous inhabitants
38
The following observations concerning succession are true except that the
Trả lời
(C)
max community has the greatest number of species
39
A vaccine is introduced into a person‘s body to
Trả lời
(B)
stimulate the body to produce antibodies
40
Which of the following activities constitutes biological control?
Trả lời
(C)
Tilapia feeding on the larvae and pupae of mosquito
41
Many diseases caused by bacteria can be treated and cured by using
Trả lời
(B)
antibiotics
42
To avoid over fishing in a lake, the following measures may be helpful except
Trả lời
(C)
fishing throughout the year
43
Conservation may be promote by
Trả lời
(A)
encouraging tree planting
44
Which of the following substances is not recycled in an ecosystem?
Trả lời
(B)
Energy
45
Which of the following statements about phenylthiocarbamide (PTC) is not correct?
Trả lời
(D)
Ability to taste the chemical is hot inheritable
46
Which of the following characters is not an example of discontinuous variation?
Trả lời
(A)
Skin color
47
Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted?
Trả lời
(D)
Heights
48
The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as
Trả lời
(C)
phenotype
49
The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as
Trả lời
(B)
mutation
50
The effective cells involved in sickle-cell anaemia disease are
Trả lời
(C)
erythrocytes
51
What does the chemical composition of the genetic material of all living organisms consist of?
Trả lời
(A)
Deoxyribonucleic acid
52
What of the following occurrences is not a feature of meiosis?
Trả lời
(D)
Formation of two diploid cell
53
Which of the following diseases is commonly observed in human males and is sex-linked?
Trả lời
(D)
colour blindness
54
The resemblance of a palatable insect to a poisonous insect is an example of
Trả lời
(C)
an escape from the predator by mimicry
55
If red is dominant to white and homozygous red pea-plants are crossed with homozygous white pea-plants, the first filial generation will have
