The body of which of the following animals can be divided into identical left and right halves in only one plane?
a. Annelids b. Coelenterates c. Arthropods d. Echinoderms
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The body of which of the following animals can be divided into identical left and right halves in only one plane?
a. Annelids b. Coelenterates c. Arthropods d. Echinoderms