EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Rate of breathing in aquatic organism is much faster than Terrestrial organism due to
A
Amount of oxygen in air is less than Water
B
Amount of oxygen in water is less than air
C
As they don’t have lungs
D
As they are very small
Explanation: 

Detailed explanation-1: -Since the amount of dissolved oxygen is fairly low compared to the amount of oxygen in the air, the rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms.

Detailed explanation-2: -Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals obtain oxygen dissolved in water. Air contains more O2 as compared to water. Since the content of O2 in the air is high, the terrestrial animals do not have to breathe faster to get more oxygen.

Detailed explanation-3: -An animal breathes faster as the concentration of oxygen in its environment decreases. An animal breathes faster as the concentration of carbon dioxide in its environment increases.

Detailed explanation-4: -While humans and terrestrial animals breathe oxygen from the air, aquatic animals use oxygen that is dissolved in water. An aquatic animal breathes by absorbing free oxygen into its blood through its gills or directly through its body surface.

Detailed explanation-5: -Certain terrestrial animals, such as earthworms and amphibians, can breathe through their skins, but amphibians have simple lungs as well. All reptiles, mammals and birds breathe using lungs; in birds there is also a system of air sacs and air spaces within the bones that make breathing more efficient.

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