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