Which of the following animals do not have jaws?
Correct answer: B. Protochordates
- A. Mammals
- B. Protochordates
- C. Reptiles
- D. Birds
Explanation
Protochordates do not possess true jaws, whereas mammals, reptiles and birds are jawed vertebrates. Mammals may be selected because they are familiar vertebrates, but the absence of jaws is associated with primitive chordate groups rather than mammals.
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