Question

The common feature shared by Amphioxus, Salpa and Doliolum is ______.

• A. presence of a vertebral column
• B. presence of a notochord throughout their life
• C. similar habitat
• D. presence of a solid nerve cord

Answer 1

The correct option is C similar habitat

Amphioxus, Salpa and Doliolum are protochordates and they are exclusively marine.
They do not have a vertebral column as they are invertebrates. They have a notochord.
Amphioxus has a persistent notochord which is present throughout its life. Salpa and Doliolum have a notochord only in their larval stages. Adult stages lack notochord. The nerve cord in these animals is hollow and not solid.