Biradial symmetry and lack of cnidoblasts are the characteristics of

  • A
    Hydra and Aurelia
  • B
    Aurelia and Adamsia
  • C
    Ctenoplana and Pleurobrachia
  • D
    Aurelia and Paramoecium

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In Ctenophora,the body bears $....$ external rows of ciliated comb plates,which help in locomotion.

Which type of digestion occurs in Ctenophora?

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