This is a 13 page revision resource I have made for the new specification for AQA A-level Biology, Unit 2 'cells', section 4 ' cell recognition and the immune system'. The booklet includes concise revision notes that could be given straight to students who could use them as they wish, for example to make flashcards etc. All students should find this really useful, particularly those aiming for high A/A* grades, where often the standard textbooks just aren't enough. However, students who find it harder to get good grades will also benefit from the style of this, in that it concisely tells them everything they need to know - it's just a case of learning it which is much easier without the waffle of textbooks and revision books e.g. CGP/kerboodle!It covers everything for this part of the specification - it's all you need to know! I spent a very long time going through revision books, LOADS of exam questions/mark schemes, the specification and other resources to make this book, so you don't have to! I hope you find this useful and if you can think of anything I can add to it to improve it just let me know!