This edition is intended for use in the preparation for the GCSE Biology examination in 2000. Written by GCSE teachers and examiners these questions and answers are produced to offer students the opportunity to practice answering exam questions, so as improve their exam technique and performance. The specially selected exam questions with worked answers and examiner's tips, show students how to avoid common mistakes and achieve maximum marks. Included is a mark scheme, revision summaries, and a full mock exam paper.