31. Invertebrates
Ecdysozoans
Multiple Choice
Multiple ChoiceAn unidentified species of animal displays the following characteristics: bilateral symmetry, a complete digestive system, an open circulatory system, distinct body segmentation, and a series of molting stages during growth. To which of the following animal phyla does this species most likely belong?
A
Cnidaria
B
Platyhelminthes
C
Nematoda
D
Annelida
E
Arthropoda
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