Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Describe the unique anatomical and morphological features of flatworms, rotifers, and Nemertea
Identify an important extracoelomic cavity found in Nemertea
Explain the key features of Platyhelminthes and their importance as parasites

By the end of this section, you will be able to do the following:

Describe the unique anatomical and morphological features of molluscs and annelids
Describe the formation of the coelom
Identify an important extracoelomic cavity in molluscs
Describe the major body regions of Mollusca and how they vary in different molluscan classes
Discuss the advantages of true body segmentation
Describe the features of animals classified in phylum Annelida

Introduction to the characteristics found in different animals and using the book: Feathers and hair, what animals wearAuthor:Jennifer Ward; Jing Jing Tsong

Provides a very basic look at the anatomy of a mollusk including the proposed anatomy of what the mollusc ancestor probably looked like. Hyperlinks to individual animals in the mollusk group.