All Chordates Have

Question

All chordates have
A)a single,dorsal,tubular,nerve cord.
B)a dorsal heart.
C)pharyngeal gill slits used for respiration.
D)all of these

Accepted Answer

Chordates are characterized by having a single, dorsal, tubular nerve cord, which is a defining feature of this phylum. While pharyngeal gill slits and a dorsal heart are common in many chordates, they are not universal characteristics.