1.

Which one of the following groups of animals is bilaterally symmetrical and triploblasticA. Coelenterates (cnidarians)B. Aschelminthes (roundworms)C. CtenophoresD. Sponges

Answer» Correct Answer - B
Aschelminthes are bilateral symmetrical and triploblastic animals, e.g. Ascaris.
Coelenterates are radially symmetrical and diploblastic animals, e.g. Obelia.
Ctenophores are radially symmetrical and diploblastic animals, e.g. Ctenoplana.
Sponges are asymmetrical or radially symmetrical and diploblastic animals, e.g. Sycon.


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