Flatworms and Cnidarians May Have Evolved from a Common Planuloid

Q21: Most monogeneans are external parasites of _.

Q44: The monogenetic flukes<br>A)are mostly ectoparasites of fish.<br>B)are

Q45: The traditionally accepted class Turbellaria is _

Q46: Gnathostomulids might most typically be found<br>A)between sand

Q47: Many rotifers can reproduce parthenogenetically.

Q48: Turbellarians have light-sensitive organs called _.

Q50: The intermediate host of the blood fluke

Q52: Structures found in tapeworms but not in

Q53: Rotifers have a unique ciliated crown known

Q54: The nervous system in planaria is<br>A)absent.<br>B)a nerve