Biology
Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 34.4, Problem 1CC
Summary Introduction

To determine:  The way by which flatworms breathe.

Introduction: Flatworms were among the most primitive animals to develop an active type of predatory lifestyle. Most species of flatworms are internal or external parasites.

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Briefly describe characteristics of the hypothetical ancestral mollusc, and tell how each class of molluscs (Caudofoveata, Solenogastres, Polyplacophora, Monoplacophora, Gastropoda, Cephalopoda, Bivalvia, Scaphopoda) differs from the ancestral condition with respect to each of the following: shell, radula, foot, mantle cavity and gills, circulatory system, and head.
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