AQA Additional Science Biology ……… Overview 1. Cells Tissues and Organs Lessons 1 - 5 Animal and Plant cells Bacteria and Yeast Specialised cells Diffusion Tissues and Organs Organ systems 2. Organisms and the Environment Lessons 6 - 11 Photosynthesis Limiting factors How plants use glucose Making the most of Photosynthesis Organisms in their environment Measuring the distribution of organisms. How valid is data ? 3. Enzymes Lessons 12 - 19 Proteins, catalysts and enzymes Factors affecting enzyme action Enzymes in Digestion Speeding up digestion Making use of enzymes High – tech enzymes 4. Energy from respiration Lessons 20 - 22 Aerobic respiration The effect of exercise on the body Anaerobic respiration 5. Simple Inheritance in animals and plants Lessons 23 - 30 Cell division and growth Cell division in sexual reproduction Stem cells From Mendel to DNA Inheritance in action Inherited conditions in Humans Stem cells and embryos 6. Old and New Species Lessons 31 - 34 The origins of life on earth Exploring fossil evidence More about extinction Isolation and the evolution of new species AQA Additional Science textbook GCSE Bitesize BBC Website