Q. Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
A) Aschelminthes (round worms)
B) Ctenophores
C) Sponges
D) Coelenterates (Cnidarians)
Explanation
[Solution from source] Roundworms (Aschelminthes) are bilaterally symmetrical, triploblastic pseudocoelomates. Ctenophores and cnidarians are radially symmetrical and diploblastic, and sponges have no true tissue layers. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.