1 SEM ACC W/RAVEN CARDED
1 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781265486297
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 33, Problem 4S
Summary Introduction

To explain:

The reason that the lack of digestive system in tapeworms indicates that it is the primitive, ancestral form of Platyhelminthes or not.

Introduction:

Platyhelminthes such as flatworms are the primitive organisms. They do not contain true organs, but they have primitive organ systems for digestion and excretion. Tapeworms do not contain digestive system because they depend on the host’s digestive system. However, free living flatworms contain a hole in the body in exchange.

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