Which of the following shows radial symmetry?

Porifera and Coelenterata

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Coelenterata and Echinodermata

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Coelenterata and Platyhelminthes

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Arthropoda and Mollusca

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Solution

The correct option is B Coelenterata and Echinodermata
Radial symmetry is the arrangement of body parts in which an organism can be divided into two equal halves in any plane from the central axis.
Porifera are asymmetrical animals.
Coelenterates are radially symmetrical.
Platyhelminthes, arthropods, and molluscans animals are bilaterally symmetrical.
Adult Echinodermata animals are also radially symmetrical.
Thus, the correct answer is option B.

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