Answer:
Possession of notochord
Possession of dorsal hollow nerve chords.
Possession of pharyngeal gill-slits
Possession of tail
Explanation:
All animals in the chordate group posses the following characteristics either throughout their entire life cycles or at some points in it:
Presence of notochord
Presence of dorsal hollow nerve chords.
Presence of pharyngeal gill-slits
Possession of tail.
