Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 24, Problem 14TYK
Summary Introduction

To explain:

The traditional evolutionary systematists found that the birds are not included in the reptilia class of vertebrates, despite the fact that this taxon is paraphyletic. The disadvantages of defining paraphyletic taxa in the classification.

Introduction:

A paraphyletic group consist of species that are not descendants of common ancestor. The taxon is divided into three groups, namely monophyletic group, polyphyletic group, and paraphyletic group. The monophyletic group includes the ancestor that is common to all of its descendants and in a polyphyletic group, a common ancestor is not shared among the descendants.

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Phylogenetic Mysteries: Crash Course Zoology #12; Author: CrashCourse;https://www.youtube.com/watch?v=cVaw7nF72Aw;License: Standard youtube license