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  • Tell me? Which one of the following statements is totallywrong about the occurrence of notochord, while the other three are correct?

Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?

  • Option 1)

    It is present only in larval tail in Ascidians

  • Option 2)

    It is replaced by a vertebral column in adult frog

  • Option 3)

    It is absent throughout life in humans from the very beginning

  • Option 4)

    It is present throughout life in Amphioxus

 

Answers (1)

best_answer

 

Phylum Chordata -

Characterised by the presence of

  1. A Notochord
  2. A dorsal hollow nerve chord
  3. Paired pharyngeal gill slits.
  4. Post - anal tail
  5. Closed circulatory system.

- wherein

They are bilaterally symmetrical, triploblastic and coelomate.

 

 Humans belong to Phylum Chordata


Option 1)

It is present only in larval tail in Ascidians

This is incorrect option

Option 2)

It is replaced by a vertebral column in adult frog

This is incorrect option

Option 3)

It is absent throughout life in humans from the very beginning

This is correct option

Option 4)

It is present throughout life in Amphioxus

This is incorrect option

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Plabita

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