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Question-1
In what way might the method of ventilation of a fish in gills be considered more efficient than the ventilation of lungs?
(A)
Gills can absorb O
2
of atmosphere and water.
(B)
Gills have more surface area than lungs.
(C)
Gills have continuous supply of water for exchange of gases.
(D)
Gills are more efficient than lungs.
Question-2
Oxygen diffuses into the blood because:
(A)
Steep diffusion gradients for O
2
and CO
2
are maintained
(B)
Oxygen is stronger, so goes into blood
(C)
Blood has a capacity to absorb oxygen
(D)
Oxygen and blood combines chemically
Question-3
Fish absorbs oxygen:
(A)
Dissolved in water physically.
(B)
Present in the chemical compound H
2
O.
(C)
Present above the surface of water.
(D)
From the oxygen rich plants in water.
Question-4
What is the percentage of O
2
in atmospheric air?
(A)
50%
(B)
25%
(C)
21 %
(D)
10%
Question-5
In large organisms, the ratio of surface area to volume is:
(A)
Small /low
(B)
Large
(C)
Dependent on the type of organisms
(D)
Equal to that of large organisms
Question-6
Respiratory organs of insects.
(A)
Trachea
(B)
Spiracles
(C)
Lungs
(D)
Skin
Question-7
Surface area of gills is increased with the presence of:
(A)
Branched filament
(B)
Alveoli
(C)
Villi
(D)
Gill cover
Question-8
Simple diffusion is the type of respiration in:
(A)
Fishes, amoeba, sponges
(B)
Sponges, paramecium & amoeba
(C)
Cockroach, frog and fish
(D)
Fish, frog and amoeba
Question-9
The alveoli of the lungs and the capillary covering alveoli has:
(A)
One cell lining
(B)
Two cell lining
(C)
Three cell lining
(D)
Four cell lining
Question-10
Tracheal respiration is possible in:
(A)
Ant, butterfly and cockroach
(B)
Spider, cockroach and scorpion
(C)
Frog, butterfly, silk worm moth
(D)
Fish, frog, cockroach
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Cambridge Secondary Grade 9
IGCSE
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