This textbook has been created with several goals in mind: to be an accessible, clear, customised and exciting guide to Ordinary Biology, while guiding learners toward high levels of academic scholarship. Teachers and learners alike will find that the content of this textbook offers all the information and requirements to study Biology in an accessible format. To make studying easier, our book has been divided into 37 Chapters, according to the different topics as stipulated in the Biology Syllabus Ordinary Level Gr. 10 & 11. The practical activities have been incorporated into the content, as required by the updated syllabus. There are questions and answers, in CD format, to help learners find out how much of the material they understand and to help them with revision. Friendly Earth Biology Grades 10 & 11 will play a valuable role in developing the learners’ knowledge of Biology and with it, an increased understanding of all life on Earth.