This book is part of a book series called Investigating Cells .

This book has been graded for interest at 9-11 years.

There are 48 pages in this book. This book was published 2010 by Heinemann Educational Books .

Barbara A. Somervill has been writing for more than 30 years. She has written newspaper and magazine articles, video scripts, and books for children. She enjoys writing about history, science, and investigating people's lives for biographies. Ms. Somervill lives with her husband in South Carolina.