Bi-radial symmetry and lack of cnidoblasts are the characteristics of

starfish and sea anemone

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Ctenoplana and comb jelly

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Aurelia and Paramecium

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Hydra and starfish

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Solution

The correct option is B
Ctenoplana and comb jelly

Cnidoblasts are stinging cells containing one giant secretory organelle (cnida) that defines the phylum cnidaria. Sea anemones, Aurelia and Hydra belong to the phylum cnidaria.

Ctenoplana and comb jellies (Beroe) are comb jellies belonging to the phylum ctenophora.

Starfishes belong to the phylum echinodermata.

Paramecium belong to the phylum ciliophora.

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