Answered: Compare and contrast the efficiency of…

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

Chapter31: Animal Phylogeny, Acoelomates, And Protostomes

Section: Chapter Questions

Problem 10TYK: What is the major morphological innovation seen in annelid worms? a. a complete digestive system b....

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1. Compare and contrast the efficiency of the different organ systems and adaptations between cnidarians and ctenophorans. Which is more efficient overall and why?

2. What are the major adaptations and characteristics present in free-living flatworms that are absent in their parasitic counterparts? Discuss how these characteristics support their lifestyles.

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

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