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  • Which of the following structure is present in all chordates?Option: 1 CraniumOption: 2 Not

Which of the following structure is present in all chordates?

Option: 1

Cranium


Option: 2

Notochord


Option: 3

Spinal cord


Option: 4

Vertebral column


Answers (1)

best_answer

 

 

Notochord: 

  • The name ‘Chordata’ is based on the presence of notochord at some stage or throughout the life cycle. 
  • It is a rod-like structure placed dorsally between the alimentary canal and nerve cord. 
  • It is derived from the mesoderm. 
  • In the vertebrates, it is present during the embryonic development. 
  • It is then replaced by the vertebral column (spine) in the postnatal stage.

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Presence of notochord during or at some stage of life cycle is an essential feature of all

Posted by

Ajit Kumar Dubey

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