Which of the following characters is not found in all the chordates :

5 2000 AIPMT Animal KingdomPhylum Chordata Easy
Which of the following characters is not found in all the chordates :
A Diaphragm
B Coelom
C Pharyngeal gill clefts
D Dorsal nerve cord

Detailed Solution

All chordates have, at least in the embryo, a notochord, a dorsal hollow nerve cord and pharyngeal gill slits. They are also coelomates.
A muscular diaphragm separating the thoracic and abdominal cavities is found only in mammals.
So the diaphragm is not found in all chordates.

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