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Haryana PMT Haryana PMT Solved Paper-2010

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

    A)  Coelenterates (cnidarians)

    B)  Aschelminthes (roundworms)

    C)  Ctenophores

    D)  Sponges

    Correct Answer: B

    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.


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