Question

An important characteristic that Hemichordates share with Chordates is:

• A. ventral tubular nerve cord.
• B. pharynx with gill slits.
• C. pharynx without gill slits.
• D. the absence of notochord.

Answer 1

The correct option is B pharynx with gill slits.

An important characteristic that hemichordates share with chordates is the pharangeal gill slits. The notochord is absent in hemichordates and hence are classified under non-chordates. In Hemichordates, there is a dorsal nerve cord, in addition to a smaller ventral nerve cord. In Chordates the ventral nerve cord is absent.