Animal KingdomHard

Question

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

Options

A.Coelenterates (cnidarians)
B.Aschelminthes (roundworms)
C.Ctenophores
D.Sponges

Solution

Aschelminthes are bilaterally symmetrical and triploblastic animals, eg, Ascaris.
Coelenterates are radially symmetrical and driploblastic animals, eg,Obelia,
Ctenophores are radially symmetrical and driploblastic animals, eg,ctenophorna.
Sponges are asymetrical or radially symmetrical and driploblastic animals, eg,Sycon.

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