Because they have three germ layers,flatworms and ribbon worms are _______________.
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Q18: Turbellarians,such as the planaria,move by
A)flame cells.
B)small pseudopodia.
C)lateral
Q19: "Endolecithal" describes a situation in which
A)there is
Q20: A planarian feeds by
A)attaching with a sucker
Q21: The long chains of bags of eggs,which
Q22: If eggs or proglottids of the pork
Q24: In tapeworms,the region just behind the scolex
Q25: The region used for attachment of a
Q26: Mesozoans
A)have two cell layers.
B)are flat,plate-like animals.
C)gave rise
Q27: Platyhelminths are
A)carnivores in most cases.
B)nearly all marine
Q28: The large posterior attachment organ of the
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