The organ which is sensitive to light in Euglena is the
إجابة
(C)
eye spot
2
Which of the following is a similarity between a typical animal cell and a typical plant cell? Presence of
إجابة
(D)
cell membrane
3
The first scientist to describe the cell was
إجابة
(C)
Robert Hooke
4
In which of the following parts of a cell is the chromosome found
إجابة
(A)
Nucleus
5
The part labelled VII is the
إجابة
(D)
diaphragm
6
The part labelled I is the?
إجابة
(B)
larynx
7
Exchange of gases takes place in the air sacs contained in the
إجابة
(C)
IV
8
During the process of breathing, volume and pressure change occur as a result of the movement of the parts labelled?
إجابة
(C)
III and VII
9
Which of the following diseases is caused by deficiency of insulin in the body?
إجابة
(B)
Diabetes mellitus
10
Which of the following is the medium of transportation of nutrients within unicellular organisms?
إجابة
(C)
Protoplasm
11
Which of the following blood vessels carries oxygenated blood into the heart?
إجابة
(A)
Pulmonary vein
12
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
إجابة
(E)
presence of small, dry surface area of the respiratory organ
13
The respiratory organ found in the cockroach is the
إجابة
(B)
trachea
14
Which of the following structures functions as an excretory, system found in flatworm?
إجابة
(C)
Flame cell
15
Which of the following organs is associated with deamination of proteins?
إجابة
(D)
Liver
16
Ultrafiltration in the kidney takes place in the
إجابة
(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?
إجابة
(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
إجابة
(B)
taste bud
19
Which type of eye defect IS illustrated in the diagram above?
إجابة
(A)
Hypermetropia
20
This defect can be corrected by the use of
إجابة
(A)
convex lens
21
Which of the following is not a courtship behaviour exhibited of animals?
إجابة
(D)
Hibernation
22
Which of the following mineral salts is a trace element?
إجابة
(A)
Zinc
23
Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
إجابة
(C)
Denitrifying bacterium
24
The process whereby microorganisms can convert atmospheric nitrogen into nitrogenous compound is
known as
إجابة
(B)
nitrogen fixation
25
What is the function of the part labelled ll?
إجابة
(A)
Attraction of insects
26
The function of the part labelled l is to
إجابة
(A)
receive pollen grains
27
How would you describe the position of the ovary in relation to the
receptacle?
إجابة
(A)
Superior
28
The parts labelled IV, V and VI respectively are the
إجابة
(C)
vitreous humour, yellow spot and optic nerve
29
The light ray entering the eye goes through the following route
إجابة
(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?
إجابة
(C)
III and VII
31
Which of the following best describes a marine habitat? A large body of water A
إجابة
(B)
with high concentration of salt
32
The following are features of Northern Guinea Savanna except
إجابة
(E)
predominance of woody trees.
33
Which of the following explains the term pyramid of numbers?
إجابة
(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?
إجابة
(E)
During photosynthesis.
35
Sea water taken in by a living organism can be recycled into the atmosphere through all the following
processes except
إجابة
(B)
digestion
36
Which of the following water pollutant may contain organisms that cause dysentery?
إجابة
(B)
Sewage
37
Which of the following is not an adaptation of plants or animals to desert environment?
إجابة
(E)
Broad leaves for storage
38
A climax community is characterised by
إجابة
(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?
إجابة
(D)
increase in primary production
40
The use of predators or parasites to control pests in the farm is known as
إجابة
(C)
biological control
41
Which of the following substances cannot control the growth of harmful micro organisms?
إجابة
(D)
isotonic sugar solution
42
Which of the following is the underlining Principle in the adoption of biological control of pests?
إجابة
(E)
The predator prey relationship in ecological community
43
The largest game reserve in Nigeria is the
إجابة
(C)
Yankari game reserve in Bauchi state
44
The following agencies are responsible for conservation of in Nigeria except
إجابة
(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?
إجابة
(B)
1:2:1
46
One of the factors that must be considered for safe blood transfusion is
إجابة
(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
إجابة
(A)
one trait is often controlled by many pairs of genes
48
Identical twins inherit their genes from
إجابة
(D)
the same ovum and the same sperm
49
The offspring produced when pure strains interbreed is described as
إجابة
(E)
hybrid
50
Which of the following diseases or disorders can be prevented by the application of the knowledge of
heredity through marriage counselling?
إجابة
(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?
إجابة
(D)
OO
52
Which of the following is a function of the chromosome?
إجابة
(A)
Transmission of hereditary traits
53
Which of the following does not illustrate adaptation to the
environment?
إجابة
(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
إجابة
(B)
protective coloration
55
The division of labour in social insects is an example of
