Question : Jaws are absent in:
Option 1: Birfds
Option 2: Fishes
Option 3: Protochordates
Option 4: Reptiles
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Correct Answer: Protochordates
Solution : The Correct Answer is Protochordates
Protochordata and cyclostomata lack jaws. The invertebrate subphylum of the chordata phylum is referred to as protochordata. It contains creatures like tunicates. Cyclostomata are a subclass of group agnatha that lack jaws, girdles, and paired appendages. Hagfish and lampreys are the two types of fish without jaws. Hagfish typically consume dead or dying fish as food.
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