Which of the following is not a characteristic feature of all chordates?
Presence of Coelom
Diaphragm that separates thorax and abdomen
Dorsal Nerve Cord
Pharyngeal gill clefts in the early embryonic stage
A
Dorsal Nerve Cord
B
Pharyngeal gill clefts in the early embryonic stage
C
Presence of Coelom
D
Diaphragm that separates thorax and abdomen
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Solution
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The correct option is D 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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