The cell is a functional unit of living organisms because
回答
(A)
multicellular organisms are made up of cells
2
The organelle which eliminate water from the body of protozoa is
回答
(B)
contractile vacuole
3
Spirogyra is regarded as a multicellular plant because
回答
(A)
its cells are linked together by cytoplasmic strands
4
The mechanism of gaseous exchange in living organisms is essentially by
回答
(C)
diffusion
5
Which of the following statement is correct about diffusion?
回答
(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
回答
(B)
fermentation
7
The following are functions of the skeleton except
回答
(E)
controlling growth rate in animals
8
Muscles are attached to bones by means of
回答
(D)
tendons
9
Which of the following tissues is not found in the stem and root of monocotyledons?
回答
(B)
Cambium
10
The pulmonary vein carries
回答
(B)
oxygenated blood from lungs to the left auricle
11
The upper part of the trachea in mammals is called
回答
(C)
larynx
12
Which of the following parts of the mammalian skin is directly is directly involved in excretion?
回答
(B)
Sweat gland
13
Kidney stone is a disease of the Kidney that result in the
回答
(A)
blockage of the tubules by solid particles
14
The following are the activities of the liver except
回答
(D)
maintenance of osmotic balance
15
Infective hepatitis is a disease of the
回答
(C)
liver
16
The pituitary is regarded as the master gland because
回答
(C)
its secretion control other endocrine glands
17
Growing radicles of seddlings are
回答
(A)
negatively phototropic
18
Over-secretion of thyroxin is likely to lead to
回答
(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
回答
(B)
plumule and radicle will not show any curvature
20
The human skin is regarded as a sense organ because it
回答
(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
回答
(A)
cerebrum
22
Which part of the ear is responsible for the maintenance of balance?
回答
(D)
semicircular canals
23
Which of the following is not part of the female reproductive system?
回答
(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?
回答
(D)
Glucose and oxygen
25
Which of the following is not seen in the transverse section of a young monocotyledonous stem?
回答
(D)
Cambium
26
The bicuspid valve is located between
回答
(A)
left auricle and left ventricle
27
During which of the following processes is food for animals produced?
回答
(A)
Photosynthesis
28
Pellagra can be prevented by taking food rich in?
回答
(B)
vitamin B
29
In testing for a reducing sugar, the food substance is usually warmed with
回答
(D)
Benedicts's solution
30
Which of the following adapts the aorta to the high pressure of the blood from the heart?
回答
(C)
Thick elastic walls
31
The part of the alimentary system of a bird where grinding of maize occurs is the
回答
(C)
gizzard
32
Natality is a factor affecting population density because it involves
回答
(E)
the number of all young ones produced in the population
33
The female part of a flower consist of the
回答
(A)
stigma, style and ovary
34
Puddles,ponds, rivers, lakes, seas and ocean are grouped together as
回答
(E)
aquatic habitat
35
Which of the following would be the primary producer in a food chain?
回答
(D)
Green plants
36
fewer number of trees is characteristic of the Savanna zones of Nigeria because
回答
(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
回答
(B)
density
38
which of the following will be the effect of waterlogged top soil on the roots of plants?
回答
(E)
the roots will be starved of air
39
Which of the following is the unit of transmission of hereditary traits in living organisms
回答
(D)
Genes
40
The role of dead organic matter in the soil is to
回答
(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
回答
(C)
support the idea of survival of the fittest
42
Which of the following may not contribute to environmental pollution?
回答
(A)
Solar energy radiation
43
Succession is best described as
回答
(A)
a process whereby organisms systematically colonize a barren habitat until stable community is formed
44
Predators are beneficial in pest control because they
回答
(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?
回答
(D)
II and IV only
46
The practice of warming soup regularly as it concerns food preservation is essentially to
回答
(D)
kill the bacteria in it
47
Agglutination occurs in blood transfusion when the
回答
(E)
antigens and anitbody in the donor and the recipient react
48
Which of the following is not a way of conserving natural resources?
回答
(D)
Encouraging poaching in game reserve
49
Which of the following limiting resources is competed for by organism in the desert?
回答
(D)
water
50
The adaptation for water conservation in organisms include the following except
回答
(A)
scales in fishes
51
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
回答
(C)
Scaly skin
52
which of the following statements best explains the term aestivation?
回答
(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
回答
(C)
natural selection
54
who formulated the theory of natural selection in evolution?
回答
(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?
