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Which of the following structure of hemichordates was previously confused with notochord?

Option: 1

Stomochord


Option: 2

Proboscis


Option: 3

Collar


Option: 4

None of these


Answers (1)

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Phylum Hemichordata - Characteristics Features -

  • These are marine worm-like animals. 
  • They bear a resemblance to the chordates in having pharyngeal gill slits. 
  • They also bear a resemblance to the phylum Echinodermata. 
  • The proboscis has a buccal diverticulum or stomochord. It was earlier considered as notochord.

The proboscis has a buccal diverticulum or stomochord. It was earlier considered as notochord.

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