The organ which is sensitive to light in Euglena is the
คำตอบ
(C)
eye spot
2
Which of the following is a similarity between a typical animal cell and a typical plant cell?presence of
คำตอบ
(D)
cell membrane
3
The first scientist to describe the cell was
คำตอบ
(C)
Robert Hooke
4
In which of the following parts of a cell is the chromosome fund?
คำตอบ
(A)
Nucleus
5
Which of the following diseases is caused by deficiency of insulin in the body?
คำตอบ
(B)
Diabetes mellitus
6
Which of the following is the medium of transportation of nutrients with unicellular organisms?
คำตอบ
(C)
Protoplasm
7
Which of the following blood vessels carries oxygenated blood into the heart?
คำตอบ
(A)
Pulmonary vein
8
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
คำตอบ
(E)
presence of small, dry surface area of the respiratory organ
9
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
คำตอบ
(E)
presence of small, dry surface area of the respiratory organ
10
The respiratory organ found in the cockroach is the
คำตอบ
(B)
trachea
11
Which of the following organs is associated with deamination of proteins?
คำตอบ
(D)
liver
12
Ultrafiltration in the kidney takes place in the
คำตอบ
(C)
Bowman's capsule
13
Which of the following is a structures functions as an excretory system found in flatworm?
คำตอบ
(C)
Flame cell
14
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 of ions on either side of the membrane?
คำตอบ
(A)
There is an excess of potassium ions inside the axon and an excess of sodium ions outside
15
The groups of sensory cells found on the upper surface of the tongue are called
คำตอบ
(B)
taste buds
16
Which of the following is not a courtship behaviour exhibited by animals
คำตอบ
(D)
Hibernation
17
Which of the following mineral salts is a trace element?
คำตอบ
(A)
Zinc
18
Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
คำตอบ
(C)
Denitrifying bacterium
19
What type of relation exists between a tapeworm and an infected mammal?
คำตอบ
(D)
Parasitism
20
Which of the following best describes a marine habitat?
คำตอบ
(C)
with high concentration of salt
21
The following are features of the tropical rain forest except
คำตอบ
(D)
scanty trees with small leaves
22
The following are features of Northern Guinea Savanna except
คำตอบ
(A)
presence of tall trees with thick bark
23
Which of the following explains the term pyramid of numbers?
คำตอบ
(E)
progressive decrease in the number of individuals from lower to higher trophic level
24
In which of the following processes is carbondioxide not given out?
คำตอบ
(E)
during photosynthesis
25
Which of the following is not an adaptation of plants or animals to desert environment?
คำตอบ
(E)
Broad leaves for storage
26
Which of the following is not an adaptation of plants or animals to desert environment?
คำตอบ
(E)
broad leaves for storage
27
A climax community is characterised by
คำตอบ
(A)
a stable composition of plant and animal species
28
Which of the following is not a characteristic of overcrowding in plant and animal community?
คำตอบ
(D)
increase in primary production
29
The use of predators or parasites to control pests in the farm is known as
คำตอบ
(C)
biological control
30
Which of the following substances cannot control the growth of harmful microoganisms?
คำตอบ
(D)
isotonic sugar solution
31
Which of the following is the underling principle in the adoption of biological control of pests?
คำตอบ
(E)
The predator-prey relationship in the ecological community
32
The following agencies are responsible for conservation in Nigeria except
คำตอบ
(D)
Nigerian Red Cross Society
33
The largest game reserve in Nigeria is the
คำตอบ
(C)
Yankari Game Reserve in Bauchi State
34
The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted
Maize Cob Colours of Maize Grains
White Pink Red
l. 30 60 30
II. 50 99 49
Which of the following ratios agrees with the result?
คำตอบ
(B)
1:2:1
35
One of the factors that must be considered for sate blood transfusion is
คำตอบ
(C)
rhesus factors of the donor and the recipient
36
One of the major criticisms against Mendelian laws is that they do not recognise that
คำตอบ
(A)
one trait is often controlled by many pairs of genes
37
Identical twins inherit their genes from
คำตอบ
(D)
the same ovum and the same sperm
38
The offspring produced when pure strains interbreed is descried as
คำตอบ
(E)
hybrid
39
Which of the following diseases or disorders can be prevented by the application of the knowledge of heredity through marriage counseling ?
คำตอบ
(A)
Sickle cell anaemia
40
Which of the following is a function of the chromosome?
คำตอบ
(A)
Transmission of hereditary traits
41
Which of the following does not illustrate adaptation to the environment ?
คำตอบ
(D)
Development of big muscies by a weight lifter
42
The changing of colour by a chameleon to that of the environment is an example of
คำตอบ
(B)
protective coloration
43
The division of labour in social insects is an example of
คำตอบ
(D)
behavioural adaptation
44
The swarming especially at the beginning of the rainy season is a courtship behaviour shown by
คำตอบ
(D)
winged termites
45
Lamarck's evolution theory could be summarised by the statement that
คำตอบ
(D)
the changing environment imposes structural physiological and behavioural changes in organisms
