Question

This phylum includes the vertebrates, together with several closely related invertebrates. They are united by having, at some stage in their life, a notochord, a hollow dorsal nerve cord, pharyngeal slits and a muscular tail extending past the anus.

Answer 1

Chordates

Step-by-step explanation:

Chordates (phylum Chordata) include the vertebrates, together with several closely related invertebrates.