[IB Biology SL at GHS:
Ecology Unit Reviews
]
15. Identify the animal phylum that has bilateral symmetry, 3 types of cell layers, segmented bodies, all body systems, and a one way digestive system (mouth to anus).
A)
Annelida
B)
Arthropoda
C)
Platyhelminthes
D)
Cnidaria
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Answer
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Slichter
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