2009 - WAEC Biology Past Questions and Answers - page 2
11
The following statements about mitotic cell division are correct except that
A
it occurs only in young cells
B
it occurs In somatic cells
C
the chromosome number of the daughter cell is the same as that of the parent
D
the genetic composition of the mother cell is the same as that of the daughter cell.
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12
The longest bone in the body is the
A
humerus
B
femur
C
scapula
D
tibia
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13
Which of the following structures is not a skeletal material?
A
Chitin
B
Cartilage
C
Bone
D
Muscle
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14
The reason why the flow of blood through the capillaries is very slow is
A
because the walls of capillaries are very thin
B
to avoid high blood pressure
C
to ensure that the individual does not get dizzy
D
to allow adequate time for exchange of materials.
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15
Which of the following features is not characteristic of arteries? Arteries
A
possess valves at intervals throughout their length
B
have thick, muscular and elastic walls
C
carry blood away from the heart
D
transport oxygenated blood with the exception of the pulmonary artery
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16
A group of rats placed in an air-tight box for some hours died because they
A
breathed in air containing nitrogen.
B
produced carbon dioxide
C
ran short of energy
D
used up the available oxygen
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17
Which of the following organisms have kidney as their excretory organ?
A
Fishes, amphibians, birds, man.
B
Fishes, amphibians, annelids, insects
C
Fishes, reptiles, birds, tapeworms
D
Fishes, protozoans, amphibians, man
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18
Which of the statements below is valid?
A
The bird’s blood was always warmer than that of the lizard
B
The body temperature of the bird varied less than that of the lizard during changes in environmental temperature
C
The body temperature of the bird remained constant despite changes in environmental temperature
D
The body temperature of the lizard was always close to that of the environmental temperature
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19
What physiological term can he used to
describe the regulation of the body
temperature of the lizard? '
A
Homeostasis
B
Homoithermy
C
Poikilothermy
D
Osmoregulation
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20
The reason why hospitals use saline solutions as drip instead of water is
A
because salt is a preservative
B
to prevent contamination of the body
C
to maintain the composition of the body fluids
D
to increase the number of blood cells
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