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

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

Haryana PMTHaryana PMT 2010

Solution:

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.