This book is part of a book series called Scientific American Critical Anthologies On Environment And .

This book has been graded for interest at 14-17 years.

This book was published 2006 by Rosen Publishing Group .

STEPHANIE WATSON is an independent scholar who has written and contributed to numerous works, including World of Genetics and Science and Its Times . She is the author of The Urinary System , and coauthor of The Endocrine System , both in Greenwood's Human Body Systems series.