Biology is a rapidly developing branch of science. The major advances that are made,
continuously affect our life on earth. Some of these important advances are included here.
The results of a recent survey on the attitudes to existing literature available to high school
students showed that many were unhappy with the material used in teaching and learning.
Those questioned identified a lack of the following; accompanying supplementary material to
main text books, current information on new developments, clear figures and diagrams and
insufficient attention to design and planning of experiments.
This book aims to improve the level of understanding of modern biology by inclusion of
the following; main texts, figures and illustrations, extensive questions, articles and experiments.
Each topic is well illustrated with figures and graphs to ease understanding.
Supplementary material in the form of posters, transparencies and cassettes will shortly be
Profiles on common diseases are included in each chapter to inform, generate further
interest and encourage students to explore the subject further. The 'Read me' articles supply
up-to-date information on important issues related to each unit but outside the requirements
of the current curriculum.
It is the intention and hope of the authors that the contents of this book will help to bridge
the current gap in the field of biology at this level.
This book has been carefully reviewed and the language is considered suitable for students
for whom English is a second language.
All errors in the previous edition have been corrected.
We are grateful to all the people who have helped with this book. My special thanks to
Salih TEKER and Musa ÖZET for their support and encouragement throughout the development
of this book.
We would like to extend my gratitude to Duran KALA, Zeki DENGÝZ, Soner EFE and
Tan ERDOÐAN whose support enabled me to complete this book.
We would like to thank all the Biology teachers in different parts of the world who have
contributed their precious time and exprience to this book.