What are the unifying characteristics of Gnathifera? Are these characteristics present in all members of the group? Is there a need for them to be placed in this group? Why or why not? 2. Account for the success of parasitic flatworms. Cite specific strategies to support your answer.

What are the unifying characteristics of Gnathifera? Are these characteristics present in all members of the group? Is there a need for them to be placed in this group? Why or why not? 2. Account for the success of parasitic flatworms. Cite specific strategies to support your answer.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter27: Protists

Section: Chapter Questions

Problem 3TYK

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Concept explainers

Parasitic infections

A parasite is an organism that lives in the body of another organism and obtains food at the expense of the host. There are two kinds of parasites they are internal and external. An internal parasite lives inside another organism and is known as endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite.

Question

1. What are the unifying characteristics of Gnathifera? Are these characteristics present in all members of the group? Is there a need for them to be placed in this group? Why or why not?

2. Account for the success of parasitic flatworms. Cite specific strategies to support your answer.

Definition Definition A phylum of organisms also known as "flatworms". They are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.

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