Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

Question

Which one of the following groups of animals is bilaterally symmetrical and triploblastic? (A) Coelenterates (cnidarians) (B) Aschelminthes (roundworms) (C) Ctenophores (D) Sponges

Tardigrade Admin · Accepted Answer

Aschelminthes are bilateral symmetrical and triploblastic animals, eg, Ascaris. Coelenterates are radially symmetrical and diploblastic animals, eg, Obelia. Ctenophores are biradial symmetrical and diploblastic animals, eg, Ctenoplana. Sponges are asymmetrical or radially symmetrical and diploblastic animals, eg, Sycon.

Q. Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

Coelenterates (cnidarians)

Aschelminthes (roundworms)

Ctenophores

Sponges