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Which of the following represents the correct combination of a taxonomic group with its characteristics, without any exception?

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Chordata - Triploblastic bilaterally symmetrical coelomates characterized by notochord, nerve cord, pharyngeal gill-slits and post-anal tail

Urochordata - Triploblastic bilaterally symmetrical animals with persistent notochord

Cephalochordata - Triploblastic bilaterally symmetrical animals with a vertebral column that extends from head to tail

Vertebrata - Triploblastic bilaterally symmetrical animals with a dorsal muscular heart

answer is A.

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Detailed Solution

All Chordates are triploblastic bilaterally symmetrical coelomates and are characterized by notochord, nerve cord, pharyngeal gill slits and post anal tail.

In all Urochordates notochord is not persistent because it is present only in the larval tail.

In Cephalochordata, notochord extends from head to tail region and is persistent throughout their life.

Vertebrates have a ventral muscular heart with two, three or four chambers.

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