This book is part of a book series called Cambridge Checkpoints .

This book was published 2007 by Cambridge University Press .

Jan Leather is the Curriculum Coordinator at Ivanhoe Girls' Grammar and has taught senior Biology for 20 years. She has also been an external examination marker and has been heavily involved in curriculum development. Harry Leather is Dean of Staff at St Michael's Grammar School. He has taught science and biology for 20 years, during which time he has also been involved in curriculum development and external examination marking.