This book is called ‘Your Biology Questions Answered’ for a good reason. Its format is based on questions and answers that I hope will help you to better understand the wonderful subject of Biology. Some questions are exam-type questions which I hope will help you gain some valuable exam technique and increase your knowledge as well. Most of the questions not exam-type questions but are made up so as to bring out for you the main points and principles of Biology that I feel and hope will be useful to you in really getting to grips with the subject. The book starts with a Book Contents section which sets out the chapters and their contents – consisting of the questions that are answered for you in that chapter. So this would be a good place to start in finding your way around the book. The chapters themselves also have the questions listed at the start so you can see what is there and find the answers that you are looking for. At the start of each chapter, after the contents page, there is a list of key words which I feel it would be helpful to you as a student to know and understand before reading the chapter – of course it is up to you whether you actually want to do that or not! I just thought that glossaries in general are annoying, in that you have to keep flicking to the back of the book to find the word you don’t know – so I have put them all at the start of each chapter to help you get to grips with the main words in the topic before you read on.