The cell is a functional unit of living organisms because
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(A)
multicellular organisms are made up of cells
2
The organelle which eliminate water from the body of protozoa is
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(B)
contractile vacuole
3
Spirogyra is regarded as a multicellular plant because
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(A)
its cells are linked together by cytoplasmic strands
4
The mechanism of gaseous exchange in living organisms is essentially by
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(C)
diffusion
5
Which of the following statement is correct about diffusion?
Răspuns
(B)
Molecules move from a region of higher concentration to a region of lower concentration
6
The process of anearobic respiration of yeast in sugar solution is known as
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(B)
fermentation
7
The following are functions of the skeleton except
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(E)
controlling growth rate in animals
8
Muscles are attached to bones by means of
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(D)
tendons
9
Which of the following tissues is not found in the stem and root of monocotyledons?
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(B)
Cambium
10
The pulmonary vein carries
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(B)
oxygenated blood from lungs to the left auricle
11
The upper part of the trachea in mammals is called
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(C)
larynx
12
Which of the following parts of the mammalian skin is directly is directly involved in excretion?
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(B)
Sweat gland
13
Kidney stone is a disease of the Kidney that result in the
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(A)
blockage of the tubules by solid particles
14
The following are the activities of the liver except
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(D)
maintenance of osmotic balance
15
Infective hepatitis is a disease of the
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(C)
liver
16
The pituitary is regarded as the master gland because
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(C)
its secretion control other endocrine glands
17
Growing radicles of seddlings are
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(A)
negatively phototropic
18
Over-secretion of thyroxin is likely to lead to
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(A)
thinness in body
19
If a germinating seed is attached horizontally on a revolving klinostat, what will be the effect of the seedling after three days? The
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(B)
plumule and radicle will not show any curvature
20
The human skin is regarded as a sense organ because it
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(E)
has nerve endings
21
The part of the brain responsible for the control the controls of voluntary movement and interpretation of sensation is the
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(A)
cerebrum
22
Which part of the ear is responsible for the maintenance of balance?
Răspuns
(D)
semicircular canals
23
Which of the following is not part of the female reproductive system?
Răspuns
(B)
Seminal vessicles
24
Which of the following substance from the mother's blood diffuse through the placenta into the blood vessels of the feotus?
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(D)
Glucose and oxygen
25
Which of the following is not seen in the transverse section of a young monocotyledonous stem?
Răspuns
(D)
Cambium
26
The bicuspid valve is located between
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(A)
left auricle and left ventricle
27
During which of the following processes is food for animals produced?
Răspuns
(A)
Photosynthesis
28
Pellagra can be prevented by taking food rich in?
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(B)
vitamin B
29
In testing for a reducing sugar, the food substance is usually warmed with
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(D)
Benedicts's solution
30
Which of the following adapts the aorta to the high pressure of the blood from the heart?
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(C)
Thick elastic walls
31
The part of the alimentary system of a bird where grinding of maize occurs is the
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(C)
gizzard
32
Natality is a factor affecting population density because it involves
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(E)
the number of all young ones produced in the population
33
The female part of a flower consist of the
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(A)
stigma, style and ovary
34
Puddles,ponds, rivers, lakes, seas and ocean are grouped together as
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(E)
aquatic habitat
35
Which of the following would be the primary producer in a food chain?
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(D)
Green plants
36
fewer number of trees is characteristic of the Savanna zones of Nigeria because
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(B)
there is limited amount of rainfall
37
The number of individuals in a habitat in relation to the unit space available to each organism is referred to as the
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(B)
density
38
which of the following will be the effect of waterlogged top soil on the roots of plants?
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(E)
the roots will be starved of air
39
Which of the following is the unit of transmission of hereditary traits in living organisms
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(D)
Genes
40
The role of dead organic matter in the soil is to
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(B)
increase the mineral salt content
41
Species do not change in order to survive. The environment determines which organism survives to reproduce. These statements
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(C)
support the idea of survival of the fittest
42
Which of the following may not contribute to environmental pollution?
Răspuns
(A)
Solar energy radiation
43
Succession is best described as
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(A)
a process whereby organisms systematically colonize a barren habitat until stable community is formed
44
Predators are beneficial in pest control because they
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(C)
feed on pests of crops
45
I.Plasmodium II. Vibro Choleroe III. Gonococcus sp IV. Poliomyelitis virus V. Syphilis bacteria
which of the following organism are transmitted by houseflies?
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(D)
II and IV only
46
The practice of warming soup regularly as it concerns food preservation is essentially to
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(D)
kill the bacteria in it
47
Agglutination occurs in blood transfusion when the
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(E)
antigens and anitbody in the donor and the recipient react
48
Which of the following is not a way of conserving natural resources?
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(D)
Encouraging poaching in game reserve
49
Which of the following limiting resources is competed for by organism in the desert?
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(D)
water
50
The adaptation for water conservation in organisms include the following except
Răspuns
(A)
scales in fishes
51
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
Răspuns
(C)
Scaly skin
52
which of the following statements best explains the term aestivation?
Răspuns
(A)
a device for survival during a period of extreme food and water shortage
53
The phenomenon whereby some organisms with certain features get established in an environment is known as
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(C)
natural selection
54
who formulated the theory of natural selection in evolution?
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(E)
Charles Darwin
55
The wing of a bat and that of a bird, the flippers of a whale and the fins of s fish are example of?
