Q. The stomochord, a rudimentary structure in the collar region similar to the notochord, is found in:
A) Hemichordata
B) Urochordata
C) Cephalochordata
D) Echinodermata
Explanation
Hemichordates (Balanoglossus, Saccoglossus) have a stomochord and are now placed as a separate phylum under non-chordata.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.