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Q.

Is it true that shrimps and crabs have gills for respiration?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Aquatic animals do not have lungs; instead, they have a unique organ called gills for respiration. The functioning of the gills is quite similar to those of the lungs. Shrimps and crabs use these gills for breathing oxygen dissolved in water. The gills have thousands of blood vessels which extract the maximum amount of oxygen. Thus, oxygen is absorbed and carbon dioxide into the water, which is expelled.
 
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