Which of the following is not a characteristic feature of all chordates?

Dorsal Nerve Cord

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Presence of Coelom

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Pharyngeal gill clefts in the early embryonic stage

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Diaphragm that separates thorax and abdomen

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Solution

The correct option is B Diaphragm that separates thorax and abdomen
Chordates are animals belonging to phylum Chordata. They possess a hollow dorsal nerve cord, pharyngeal slits, and a post-anal tail, for at least some period of their life cycle.
The diaphragm is present in only in mammals, which separates thorax and abdomen.
So, the correct option is 'Diaphragm that separates thorax and abdomen'.

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Name the phylum in which dorsal nerve tube, notochord and pharyngeal gill clefts are present.

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