Chapter 17, Problem 9RQ

Summary Introduction

To compare: The freshwater oligochaetes from earthworms.

Introduction: All the animal species on Earth are classified into different phyla or groups. They are classified on the basis of their characters, morphology, anatomy, and most importantly their phylogeny. One of these phyla is named as Annelida.  Some examples are marine bristle worms, leeches, earthworms.