Which one of the following pairs of animal comprises 'jawless fishes'?
Which one of the following pairs of animal comprises 'jawless fishes'?
Lampreys and eels
Mackerals and rohu
Lampreys and hag fishes
Guppies and hag fishes
Solution
Lampreys and Myxine (hag fish) belong to the class-Cyclostomata, group-Agnatha of Vertebrata. Agnatha have mouth without jaws. In these, mouth is ventral, suctorial and circular.