Question

Protochordata mark the evolution of a new type of body structure. How?

• A. By presence of notochord
• B. By separating nervous tissue from the gut
• C. By developing a circulatory system
• D. None of the above

Answer 1

The correct option is A

By presence of notochord

Protochordates are the first animals to show the presence of notochord at some stage of life. While the notochord does separate the nervous tissue from the gut, the presence of notochord is far more significant in evolutionary studies.