Non-chordates have a heart, if they have one, while the chordates usually have a heart.

ventral

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dorsal

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posterior

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Solution

The correct option is C dorsal
Non chordates are characterised by the absence of notochord, pharyngeal gill slits and anal tail. Nerve cord in them is double and placed ventrally. Heart, if present, is normally dorsal.

Chordates are characterised by the presence of a notochord, dorsal hollow nerve cord, pharyngeal gill slits and a post-anal tail. They have a ventral heart.

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