Both radial and bilateral symmetry is found in the phylum____________?
Correct answer: C. Echinodermata
- A. Protozoa
- B. Porifera
- C. Echinodermata
- D. None of these
Explanation
Echinoderms have bilateral symmetry in their larval stage but generally radial, specifically pentaradial, symmetry as adults. Students may choose Porifera because some sponges show radial organisation, but sponges are commonly asymmetrical and do not characteristically show this clear larval-adult change.
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