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Question

Biradial symmetry and lack of cnidoblasts are characteristics of


A
Hydra and Starfish
loader
B
Starfish and Sea Anemone
loader
C
Ctenoplana/Ctenophora and Beroe
loader
D
Aurelia and Paramecium
loader

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'.

Biology

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