At some point during development, all members of the ____ phylum have a hollow dorsal nerve cord, a perforated pharynx, a notochord, and segmented muscles in both the body wall and postanal tail.

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Members of the Chordata phylum, at some stage in their development, exhibit a hollow dorsal nerve cord, a notochord, pharyngeal slits (perforated pharynx), and segmented muscles in both the body wall and postanal tail. These features distinguish them from members of other phyla.

At Some Point During Development, All Members of the ____