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Important characteristic that hemichordates share with chordates is

(a) ventral tubular nerve cord

(b) pharynx with gill slits

(c) pharynx without gill slits

(d) absence of notochord.
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Ans: (b) pharynx with gill slits

Sol: An important characteristics that hemichordates and chorddates share is presence of pharyngeal gill slits. Gill slits are dorsal in position in hemichordates whereas they are lateral in chordates. A true unotochord does not occur in hemichordates. Nervous system is distinctly of vertebrate type being intraepidermal in position and having a ventral nerve cord.

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