2013 - WAEC Biology Past Questions and Answers - page 2
11
Which of the following organs are used for gaseous exchange in a mature toad?
A
Gills, lungs and eardrum
B
Lungs, mouth and eardrum
C
Mouth, skin and gils
D
Skin, lungs and mouth
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12
Which of the following statements about the diaphragm of a mammal is not correct? it
A
separates the thorax and the abdomen
B
is a thick layer of muscle
C
is made of epithelial cells
D
is part of the human respiratory apparatus
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13
Which of the following structures is used for respiration in insects?
A
Lungs
B
Thorax
C
Cuticle
D
Spiracles
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14
A substance present in the glomerular filtrate in the mammalian Kidney is
A
glucose
B
fibrinogen
C
albumen
D
blood platelets
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15
In humans, excretion of hypertonic urine is associated with the
A
distal convoluted tubule
B
loop of Henle
C
bowman's capsule
D
proximal convoluted tubule
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16
The maintenance of a stable internal environment within the body of a mammal is known as
A
osmosis
B
plasmolysis
C
homeostasis
D
excretion
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17
Which part of the nephron is associated with ultra-filtration?
A
Distal convoluted tubule
B
Proximal convoluted tubule
C
Collecting duct
D
Bowman's capsule
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18
Which of the following conditions would result result in a decrease in the production of antidiuretic hormone?
A
Abnormally high blood sugar level
B
Drinking large quantities of water
C
Increase in osmotic pressure of blood
D
Period of strenuous exercise
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19
Which of the following structures is not essential in a wind pollinated flower?
A
Anther
B
Ovary
C
Stigma
D
Petal
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20
The resolution of a microscope refers to its power to
A
increase an object's apparent size
B
distinguish clearly between two objects
C
scan the surface of an object
D
focus on an object
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