Ribbon Worms and Flatworms Both Have

Q2: Minute,wormlike animals that live as parasites in

Q3: Turbellarians have light-sensitive organs called _ or

Q6: Animals with three well-defined germ layers and

Q18: Some rotifers have a thick case-like layer

Q19: Tissues that seem to violate the cell

Q22: The region used for attachment of a

Q27: The nervous system of a freshwater planarian

Q31: A farmer in a rice paddy in

Q38: Trematodes have a body covering known as

Q55: The large posterior attachment organ of the