The organ which is sensitive to light in Euglena is the
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(C)
eye spot
2
Which of the following is a similarity between a typical animal cell and a typical plant cell? Presence of
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(D)
cell membrane
3
The first scientist to describe the cell was
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(C)
Robert Hooke
4
In which of the following parts of a cell is the chromosome found
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(A)
Nucleus
5
The part labelled VII is the
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(D)
diaphragm
6
The part labelled I is the?
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(B)
larynx
7
Exchange of gases takes place in the air sacs contained in the
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(C)
IV
8
During the process of breathing, volume and pressure change occur as a result of the movement of the parts labelled?
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(C)
III and VII
9
Which of the following diseases is caused by deficiency of insulin in the body?
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(B)
Diabetes mellitus
10
Which of the following is the medium of transportation of nutrients within unicellular organisms?
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(C)
Protoplasm
11
Which of the following blood vessels carries oxygenated blood into the heart?
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(A)
Pulmonary vein
12
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
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(E)
presence of small, dry surface area of the respiratory organ
13
The respiratory organ found in the cockroach is the
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(B)
trachea
14
Which of the following structures functions as an excretory, system found in flatworm?
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(C)
Flame cell
15
Which of the following organs is associated with deamination of proteins?
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(D)
Liver
16
Ultrafiltration in the kidney takes place in the
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(C)
Bowman’s capsule
17
When an axon is at rest, the concentration of ions on either side of the membrane are different. Which of the following is correct about the concentrations ions on either side of the membrane?
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(A)
There is an excess of potassium ions inside the axon and an excess of sodium ions outside
18
The groups of sensory cells found on the upper surface of the tongue are called
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(B)
taste bud
19
Which type of eye defect IS illustrated in the diagram above?
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(A)
Hypermetropia
20
This defect can be corrected by the use of
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(A)
convex lens
21
Which of the following is not a courtship behaviour exhibited of animals?
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(D)
Hibernation
22
Which of the following mineral salts is a trace element?
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(A)
Zinc
23
Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
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(C)
Denitrifying bacterium
24
The process whereby microorganisms can convert atmospheric nitrogen into nitrogenous compound is
known as
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(B)
nitrogen fixation
25
What is the function of the part labelled ll?
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(A)
Attraction of insects
26
The function of the part labelled l is to
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(A)
receive pollen grains
27
How would you describe the position of the ovary in relation to the
receptacle?
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(A)
Superior
28
The parts labelled IV, V and VI respectively are the
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(C)
vitreous humour, yellow spot and optic nerve
29
The light ray entering the eye goes through the following route
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(C)
II, I, III, IV
30
Which of the following structures are adjusted in focusing the image of a
distant or near object on the retina?
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(C)
III and VII
31
Which of the following best describes a marine habitat? A large body of water A
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(B)
with high concentration of salt
32
The following are features of Northern Guinea Savanna except
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(E)
predominance of woody trees.
33
Which of the following explains the term pyramid of numbers?
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(E)
Progressive decrease in the number of individuals from lower to higher trophic level
34
In which of the following processes is carbondioxide not given out?
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(E)
During photosynthesis.
35
Sea water taken in by a living organism can be recycled into the atmosphere through all the following
processes except
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(B)
digestion
36
Which of the following water pollutant may contain organisms that cause dysentery?
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(B)
Sewage
37
Which of the following is not an adaptation of plants or animals to desert environment?
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(E)
Broad leaves for storage
38
A climax community is characterised by
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(A)
a stable composition of plant and animal species
39
Which of the following is not a characteristic of overcrowding in plant and animal community?
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(D)
increase in primary production
40
The use of predators or parasites to control pests in the farm is known as
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(C)
biological control
41
Which of the following substances cannot control the growth of harmful micro organisms?
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(D)
isotonic sugar solution
42
Which of the following is the underlining Principle in the adoption of biological control of pests?
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(E)
The predator prey relationship in ecological community
43
The largest game reserve in Nigeria is the
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(C)
Yankari game reserve in Bauchi state
44
The following agencies are responsible for conservation of in Nigeria except
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(D)
Nigerian red cross society
45
The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted
Maize cob
White
Pink
Red
I
30
60
30
II
50
99
49
Which of the following ratios agrees with the result?
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(B)
1:2:1
46
One of the factors that must be considered for safe blood transfusion is
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(C)
rhesus factors of the donor and the recipient
47
One of the major criticisms against ‘Mendelian laws is that they do not recognize that
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(A)
one trait is often controlled by many pairs of genes
48
Identical twins inherit their genes from
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(D)
the same ovum and the same sperm
49
The offspring produced when pure strains interbreed is described as
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(E)
hybrid
50
Which of the following diseases or disorders can be prevented by the application of the knowledge of
heredity through marriage counselling?
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(A)
Sickle cell anaemia
51
Study the genetic cross above showing the inheritance of blood groups from the cross above which of the following F offspring does not
belong to the father?
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(D)
OO
52
Which of the following is a function of the chromosome?
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(A)
Transmission of hereditary traits
53
Which of the following does not illustrate adaptation to the
environment?
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(D)
Development of big muscles by a weight lifter
54
The changing of colour by a chameleon to that of the environment is
an example of
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(B)
protective coloration
55
The division of labour in social insects is an example of
