The problems in this chapter ask students to identify basic needs of living things and to describe simple life cycles of animals, plants, and fungi. The problems involve students in a number of science practices included in the Next Generation Science Standards (NGSS). In this problem, students learn about the life cycle of a hamster, and the transfer task asks them to compare the life cycle of hamsters with the life cycle of other animals, including humans. A comparison of the life cycles of a hamster and a human is included. This problem centers on hamsters because they are common classroom pets. Any mammal will work well in this problem. A materials list, teacher background information, safety practices, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Preface, Catalog of Problems, Acknowledgments, About the Authors, References, and Index.