One of the primary characters of chordates is

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(D) The primary characteristic of chordates is the presence of a dorsal hollow nerve cord. The nerve cord is a part of the nervous system and is found

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Dorsal hollow nerve cord

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(D) The primary characteristic of chordates is the presence of a dorsal hollow nerve cord. The nerve cord is a part of the nervous system and is found in both chordates and non-chordates. In non-chordates,the nerve cord is ventral in position and solid,whereas in chordates,it is dorsal,hollow,and single.

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