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Animal Kingdom

Question
CBSEENBI11002484
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Which one onf the following groups of animals is bilaterally symmetrical and triploblastic?

  • Coelenterates (cnidarians)

  • Aschelminthes (roundworms)

  • ctenophores

  • Sponges

Solution

B.

Aschelminthes (roundworms)

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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