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