[IB Biology SL at GHS: Ecology Unit Reviews]

19. Which of the following animal phyla has bilateral symmetry?

A) Porifera, Arthropoda, and Mollusca

B) Annelida and Cnidaria

C) Porifera

D) Platyhelminthes, Annelida, Arthropoda and Mollusca

E) All of these animal phyla have bilateral symmetry.

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Slichter