Biradial symmetry and lack of cnidoblasts are the characteristics of ________________.

Hydra and starfish

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Starfish and sea anemone

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Ctenophora and Beroe

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Aurelia and Paramoecium

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Solution

The correct option is A Hydra and starfish
Biradial symmetry and lack of cnidoblasts are the characteristics of Ctenoplana and Beroe. They both belong to phylum- Ctenophora. They are called comb-bearers and comb-jellies. The external surface of the body bears eight median comb plates. They are biradially symmetrical animals. Cnidoblasts are absent in the ctenophores.
So, the correct option is option C

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