O Level Bio Revision Book S. 3, 4 Caltec S.3

Lubegaedward@ymail.com Page 1 CONCISE O’LEVEL BIOLOGY REVISION BOOK 3&4 STUDENT ’S REVISION EXERCISE BOOK FIRST EDITION JANUARY 2015 Name of student: Name of school: Class: Year: By: Lubega Edward Bsc. Educ (Hons) MUK Contacts: +256783034634/+25670465801 8 E-mail: lubegaedward@ymail.com Lubegaedward@ymail.com Page 2 CONTENTS ACKNOWLEDGEMENTS ................................ ................................ ................................ ....................... 3 Aim of the book ................................ ................................ ................................ ................................ ...... 4 How to use the book ................................ ................................ ................................ ............................... 4 How to approach o -level biology examinations ................................ ................................ ....................... 4 Steps to successful revision ................................ ................................ ................................ ..................... 4 Approaching sections in 553/1 O’level biology paper 1 ................................ ................................ ........... 5 RESPIRATION ................................ ................................ ................................ ................................ ......... 7 GASEOUS EXCHAN GE ................................ ................................ ................................ ......................... 15 EXCRETION AND OSMOREGULATION ................................ ................................ ............................ 30 COORNINATION ................................ ................................ ................................ ................................ ... 47 LOCOMOTION ................................ ................................ ................................ ................................ ...... 67 REPRODUCTION ................................ ................................ ................................ ................................ .. 77 VARIATION, HEREDITY AND GENETICS ................................ ................................ ......................... 85 GROWTH AND DEV ELOPMENT ................................ ................................ ................................ ......... 92 ECOLOGY ................................ ................................ ................................ ................................ ............ 102 Lubegaedward@ymail.com Page 3 ACKNOWLEDGEMENT It’s almost impossible to thank all people who have contributed to the successful completion of this work a nd I must apologize in advance to those who are inadvertently left out. First and foremost, I would like to thank the Almighty God who created me to enjoy this World and has been with me throughout this work. I gratefully acknowledge the significant contri bution of my ; 1. Beloved long -time friends; Josephine, Alex, David and Norbert for their commitment of time, energy, and intellectual resources has been outstanding . 2. Established senior biology teachers whose support, intellectual guidance and constructive criticism has been pivotal in the completion of this book; Mr. Rubahamya J.B ( Makerere coll. Sch), Mr. Ouma Billy (our lady of Africa Namilyango), Mr. Atuhairwe martin …