22. The class of cnidarians with the most conspicuous medusa stage is O a) Hydrozoa 。b) Scyphozoa 。c) Anthozoa Od) Ctenophora O e) All of the above
Homework Answers
21) True. An adult tapeworm has a knoblike head or scolex which are equipped with hooks for attaching to the intestinal wall of host, neck region and a series of flat, rectangular body segments or proglottis which are generated by neck.
The chain of proglottis may reach the length of 4.6-6.1 metre.
22) Cnidarians generally have 2 body forms: polyp and Medusa, both of which often occur within the life cycle of single cnidarian.
In Scyphozoans, Medusa form is larger and better known than polyp form.
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