In vertebrates, the ______ is/are usually replaced by _______.

Biology
Tutor: None Selected Time limit: 1 Day

A. pharyngeal pouches; gill arches

B. dorsal hollow nerve cord; a ventral solid nerve cord

C. gill arches; pharyngeal pouches

D. notochord; a dorsal hollow nerve cord

E. notochord; a vertebral column

Mar 24th, 2015

E. notochord; a vertebral column

Mar 24th, 2015

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