Biradial symmetry and lack of cnidoblasts are characteristics of

Hydra and Starfish

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Starfish and Sea Anemone

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Ctenoplana/Ctenophora and Beroe

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Aurelia and Paramecium

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Solution

The correct option is C Ctenoplana/Ctenophora and Beroe
Biradial symmetry is a combination of radial and bilateral symmetry, as in the ctenophores. Here, the body components are arranged with similar parts on either side of a central axis, and each of the four sides of the body is identical to the opposite side but different from the adjacent side. Also, Cnidblasts being exclusive Cnidarian character does not exist in Ctenophora.
So, the correct answer is 'Ctenoplana and Boroe'.

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