Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
Aschelminthes
Ctenophores
Sponges
Coelenterate
Phylum Aschelminthes and Body Plan of Aschelminthes -
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These are triploblastic and pseudocoelomate animals. It implies that there is pseudocoelomic fluid that acts to provide hydroskeleton.