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?
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(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?
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(D)
semicircular canals
23
Which of the following is not part of the female reproductive system?
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(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?
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(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?
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(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?
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(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
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(A)
scales in fishes
51
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
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(C)
Scaly skin
52
which of the following statements best explains the term aestivation?
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(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?
