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Amphioxus does not possess a vertebral column? yes or no?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter32: Deuterostomes: Vertebrates And Their Closest Relatives

Section32.4: “agnathans”: Hagfishes And Lampreys, Conodonts And Ostracoderms

Problem 2SB: What traits in conodonts and ostracoderms are derived relative to those in hagfishes and lampreys?

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