Terrestrial organisms use atmospheric oxygen for respiration, which is absorbed by different organs in different animals.
Most mammals such as dogs, monkeys, horses, etc. respire through special sac like spongy organs called lungs. Tadpoles breathe through gills, though they breathe through skin and lungs when they became frogs.
Which of the following are correct ? (a) Terrestrial organisms use atmospheric oxygen for respiration, which is absorbed by different organs in different animals. (b) All the respiratory organs in terrestrial organisms have a structure that decrease the surface area and is in contact with the oxygen rich atmosphere. | |||
Right Option : A | |||
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Which of the following are correct ? (a) Respiratory organs in animals have a structure that increase the surface area and is in contact with the oxygen rich atmosphere . (b) Tadpoles breathe through gills, though they breathe through skin and lungs when they became frogs. (c) The skin is the respiratory organ in animals like frogs and earthworms .
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Right Option : D | |||
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Which of the following are correct ? (a) Unicellular animals breathe through their cell membrane. (b) In Unicellular animals the exchange of gases take place by the process of diffusion. (c) In the unicellular animals if the concentration of carbon dioxide gas is less in the body then it gets diffused out of the body and oxygen get absorbed by the skin. | |||
Right Option : A | |||
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