Question

In cephalochordates, the notochord is:

• A. Found in larva and replaced by vertebral column in adult
• B. Found in larval stage and persist in adult
• C. Found in larval stage and lost in adult
• D. Found in larval stage and replaced by spinal cord in adult

Answer 1

The correct option is B Found in larval stage and persist in adult

Cephalochordata are often referred to as protochordates and are exclusively marine. In cephalochordates, notochord extends from head to tail region and is persistent throughout their life. They have long body. The body tapers or is pointed at both ends with a large notochord, thats extend from tip to tip and is present throughout life.