Q. Which of the following animals is NOT radially symmetrical as an adult?
A) Hydra
B) Pleurobrachia
C) Ascaris
D) Asterias
Explanation
Ascaris is an aschelminth and is bilaterally symmetrical. Hydra (coelenterate), Pleurobrachia (ctenophore) and Asterias (echinoderm adult) are radially symmetrical.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.