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