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Question

Which one of the following is absent in shark?


A
Claspers
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B
Placoid scales
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C
Cartilaginous endoskeleton
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D
Air bladder
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Solution

The correct option is D Air bladder
  • Sharks are cartilaginous fishes that do not have air bladders and hence have to swim continuously or else they may sink.
  • They have placoid scales, cartilaginous endoskeleton, Male sharks have claspers that help in mating during sexual reproduction. 

Thus, the correct answer is option D.

Biology

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