This video segment explores the benefits and pitfalls of cloning as a means of reproduction. From Evolution: "Why Sex?" [3:17] Accompanied by a short background essay.

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 important difference between the life cycle of amphibians and the life cycles of other vertebrates
Distinguish between the characteristics of Urodela, Anura, and Apoda
Describe the evolutionary history of amphibians

Guest lecture recorded July 30, 2020 by Dr. Jessica Whited, Assistant Professor of Stem Cell and Regenerative Biology at Harvard University. Dr. Whited studies limb regeneration in axolotl salamanders, with the ultimate goal of discovering how to regenerate limbs in patients. In this webinar, Dr. Whited discusses how her work involves using Cas9-mediated gene drives to generate axolotls with the desired genetic backgrounds.

As part of the Asia Trail exhibit at the National Zoo, this site highlights various facts and interesting information on the Japanese Giant Salamander. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.