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NEET2009BotanyAnimal KingdomActual

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

Options

  1. ACoelenterates (cnidarians)
  2. BAschelminthes (roundworms)
  3. CCtenophores
  4. DSponges

Correct answer

B. Aschelminthes (roundworms)

Step-by-step 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 asymetrical or radially symmetrical and diploblastic animals, eg, Sycon.

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