Q.

Which one of these animals is jawless -

A. Sphyrna
B. Trygon
C. Myxine
D. Shark
Answer» C. Myxine
Explanation: Myxine is a species of jawless fish. It is known as Hag fish in Europe. These are generally classified with the lampreys into the superclass Agnatha (law-less vertebrates) within the subphylum Vertebrata. All other living fishes (shark, rays, chimeras and bony fishes) possess true jaws derived from gill arches and are placed in the superclass Gnathostomata.
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Biology (GK)

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