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 32.4, Problem 1SB
Summary Introduction

To review:

The reason behind the early lineages of the living hagfishes and lampreys in the evolution of vertebrates along with their characteristics.

Introduction:

Hagfishes and lampreys both belong to the class Agnatha and phylum Chordata. These fishes are jawless and engulf their food with the help of a sucking mouth. The notochord in lamprey is surrounded by cartilage, but notochord in hagfishes is not surrounded by any membrane. Both these fishes are eel-like and do not have fins.

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Biology: The Dynamic Science (MindTap Course List)

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