PowerPoint presentation and worksheet on antibiotic resistance for GCSE biology for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows on from Evolution (https://www.tes.com/teaching-resource/resource-12557498) Content Covered: -Emergence of resistant strains by mutation -Population growth of antibiotic resistant bacteria through natural selection -Misuse of antibiotics -Development of new antibiotics Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on variation and selective breeding for GCSE biology for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource assumes some basic knowledge of sexual reproduction and inheritance. Next topic Evolution: https://www.tes.com/teaching-resource/resource-12557498 Content Covered: Genetic variation Environmental variation Selective breeding Causes of variation (mutation and sexual reproduction) Uses and disadvantages of selective breeding Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on digestive enzymes for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Leads on to the Respiratory System: https://www.tes.com/teaching-resource/respiratory-system-slides-and-worksheet-gcse-biology-aqa-12337350 Content Covered: Overview of the digestive system Proteases, lipases and carbohydrases Bile Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Digestive Enzymes Lesson https://www.tes.com/teaching-resource/resource-12903171

PowerPoint presentation and worksheet on drugs and drug development for teaching and revision. This resource follows the AQA Biology GCSE syllabus. Leads on to Monoclonal Antibodies: https://www.tes.com/teaching-resource/monoclonal-antibodies-slides-and-worksheet-gcse-biology-aqa-12357328 Content Covered: Antibiotics Antibiotic resistance Drug discovery Preclinical and Clinical trials Animal testing Double-blind studies Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. New! Drugs Lesson GCSE Biology https://www.tes.com/teaching-resource/resource-12948723

PowerPoint presentation and worksheet on cell organisation for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Leads on to Enzymes: https://www.tes.com/teaching-resource/enzymes-slides-and-worksheet-gcse-biology-aqa-12345968 and Plant Cell Organisation: https://www.tes.com/teaching-resource/plant-cell-organisation-slides-and-worksheet-gcse-biology-aqa-12315439 Content Covered: Hierarchy of cell organisation from cell to organism Glandular, muscle and epithelial tissue The digestive system Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo NEW: Cell organisation lesson https://www.tes.com/teaching-resource/resource-12842264

PowerPoint presentation and worksheet on specialised cells for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Leads on to Stem Cells: https://www.tes.com/teaching-resource/stem-cells-slides-and-worksheet-gcse-biology-aqa-12317132 Content Covered: Specialised cells Muscle, nerve and sperm cells Xylem, phloem, root hair and guard cells Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Stem cells lesson https://www.tes.com/teaching-resource/resource-12829988

PowerPoint presentation and worksheet on plant cell organisation for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Leads on to Transpiration and Translocation: https://www.tes.com/teaching-resource/transpiration-and-translocation-slides-and-worksheet-gcse-biology-aqa-12342331 Content Covered: Plant cell organisation Leaf tissues (epidermal, mesophyll, xylem and phloem) Meristems Plant cell structure Specialist plant cells Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo NEW: Plant cell organisation lesson https://www.tes.com/teaching-resource/resource-12863539 Plant cell organisation revision lesson https://www.tes.com/teaching-resource/resource-12903755 Photosynthesis lesson https://www.tes.com/teaching-resource/resource-12953622 Rate of photosynthesis lesson https://www.tes.com/teaching-resource/resource-12954106

PowerPoint presentation and worksheet on biodiversity and waste management for GCSE biology for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows on from Decay and Biogas (https://www.tes.com/teaching-resource/resource-12646900) Content Covered: -Biodiversity meaning and importance -Recap of interdependence -Effect of human activity on biodiversity -Population increase -Air pollution -Land pollution -Water pollution Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on adrenaline and thyroxine for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Related topic the Endocrine System: https://www.tes.com/teaching-resource/resource-12362835 Content Covered: Adrenaline regulation of the flight or fight response Thyroxine regulation of metabolism Negative feedback graphs Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on plant diseases and defences for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Related topic Photosynthesis: https://www.tes.com/teaching-resource/resource-12359219 Content Covered: Symptoms of plant diseases Diagnosing plant diseases Barrier, mechanical and chemical defences Mineral deficiencies Pests Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. New! Lessons on Plant Disease for GCSE Biology Plant disease and defences: https://www.tes.com/teaching-resource/resource-12949241 Revision lesson topics 1-4 Rose black Spot Case Study: https://www.tes.com/teaching-resource/resource-12953529

PowerPoint presentation and worksheet on exchanging substances in biology for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Leads on to Active Transport: https://www.tes.com/teaching-resource/active-transport-slides-and-worksheet-gcse-biology-aqa-12335738 Content Covered: Surface area to volume ratio Gas exchange in the lungs Nutrient uptake in the small intestine Gas exchange in leaves Gas exchange in gills Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Exchanging substances lesson https://www.tes.com/teaching-resource/resource-12832416

PowerPoint presentation and worksheet on the endocrine system for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Related topic Adrenaline and Thyroxine: https://www.tes.com/teaching-resource/-12368302 Content Covered: Glands of the endocrine system (pituitary, thyroid, adrenal, pancreas, ovaries and testes) Hormone vs. nervous responses Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on the nervous system for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Next topic The Brain: https://www.tes.com/teaching-resource/resource-12361785 Content Covered: Parts of the nervous system Neurons Synapses Reflexes Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Nervous system lesson GCSE Biology https://www.tes.com/teaching-resource/resource-12960383

PowerPoint presentation and worksheet on photosynthesis for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Related topic Respiration: https://www.tes.com/teaching-resource/resource-12360359 Content Covered: Photosynthesis reaction Plant uses for glucose Rate of photosynthesis and limiting factors Ideal conditions for photosynthesis Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on respiration for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Next topic The Nervous System: https://www.tes.com/teaching-resource/resource-12361294 Content Covered: Processes which use energy from respiration Aerobic vs anaerobic respiration Exercise Anaerobic respiration in plants and yeast Oxygen debt Pulse and breathing rate Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on the respiratory system for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Leads on to Circulatory System: https://www.tes.com/teaching-resource/circulatory-system-slides-and-worksheet-gcse-biology-aqa-12340179 Content Covered: Thorax anatomy (lungs, diaphragm, bronchus, bronchioles, alveoli) Gas exchange in the body Calculating breathing rate Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Lungs lesson https://www.tes.com/teaching-resource/resource-12866802

PowerPoint presentation and worksheet on plant hormones for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus. Related topic Plant Disease: https://www.tes.com/teaching-resource/resource-12357901 Content Covered: Ethene Gibberellin Auxins Phototropism and geotropism Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo

PowerPoint presentation and worksheet on microscopy for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource covers the AQA Biology GCSE syllabus. There is a free accompanying resource covering the onion cell microscopy practical: https://www.tes.com/teaching-resource/microscopy-practical-onion-cells-12329755 Content Covered: Light microscopes Electron microscopes Resolution vs magnification Calculations Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Microscopy lesson https://www.tes.com/teaching-resource/resource-12829559

PowerPoint presentation and worksheet on active transport for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Next topic Transpiration and Translocation: https://www.tes.com/teaching-resource/resource-12342331 This task assumes that diffusion and osmosis have already been covered. Free resource available: https://www.tes.com/teaching-resource/diffusion-and-osmosis-with-worksheet-gcse-biology-aqa-12335213 Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo New! Active transport lesson https://www.tes.com/teaching-resource/resource-12831984

PowerPoint presentation and worksheet on control of body temperature for teaching and revision. Simple step by step explanations of concepts up to the end of KS4. This resource follows the AQA Biology GCSE syllabus but is also applicable to other courses. Next topic The Endocrine System: https://www.tes.com/teaching-resource/resource-12362835 Content Covered: Recap enzymes and homeostasis Negative feedback control of body temperature The thermoregulatory center Hot and cold skin responses Frostbite Antagonistic effectors Suitable for remote online distance learning and usable by non-specialists, including for homeschooling. www.tes.com/teaching-resources/shop/Dr_Troilo