Choose the correct statements.

A) Notochord is persistent throughout the life in lancelets.

B) Notochord is present only in the larval tail in ascidians.

C) Notochord lies mid dorsally, above the the nerve cord in chordates.

D) Notochord replaces the vertebral column in vertebrates.

• A

  A, B, C

• B

  B, C, D

• C

  A, B only

• D

  B, C only