11.What do hagfishes and lampreys have in common with the extinct conodonts?
(A) Lungs
(B) The jawless condition
(C) Bony vertebrae
(D) Their mode of feeding
(E) Swim bladders
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(B) 無頜狀態(The jawless...
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海鰻(hagfishes)與七鰓鰻(la...