Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.6 - Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers. Specification Point 4.7 - Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer. Specification Point 4.8 - Understand the transfer of substances and energy along a food chain. Specification Point 4.9 - Understand why only about 10% of energy is transferred from one trophic level to the next. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.11B - Describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria. Complete set of Chapter 6 Lectures are available.

Complete set of concise, modern presentations for Edexcel IGCSE Biology (4BI0) Chapter 7 - Use of Biological Resources. Contains colour coded specification points with handmade vector graphics. Six presentations included: 57 - Crop Production 58 - Microorganisms for Food 59 - Fish Farming 60 - Selective Breeding 61 - Genetic Modification 62 - Cloning

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.2.2 - All cells arise from other cells. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.2.3 - Transport across cell membranes. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.4.1 - Mass transport in animals. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.2 - Gas exchange. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.1 - DNA, genes and chromosomes. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.6 - Biodiversity within a community. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.4 - Genetic diversity and adaptation. Complete set of Chapter 4 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 3 - The Exchange of Substances. Contains colour coded specification points. Nine presentations included: 18 - Size and Surface Area 19 - Gas Exchange 20 - Gas Exchange in Humans 21 - Lung Disease 22 - Digestion and Absorption 23 - Haemoglobin 24 - The Circulatory System 25 - Cardiovascular Disease 26 - Xylem and Phloem

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 4 - Variation Between Organisms. Contains colour coded specification points. Nine presentations included: 27 - DNA, Genes and Chromosomes 28 - Transcription and Translation 29 - Meiosis and Genetic Variation 30 - Mutations 31 - Genetic Diversity 32 - Natural Selection 33 - Classifying Organisms 34 - Biodiversity 35 - Investigating Variation

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.63B - Understand how vaccination results in the manufacture of memory cells, which enable future antibody production to the pathogen to occur sooner, faster and in greater quantity. Complete set of Chapter 3 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 2 - Variety of Living Organisms. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 1.2 - Describe the common features shown by eukaryotic organisms: plants, animals, fungi and protoctista. Specification Point 1.3 - Describe the common features shown by prokaryotic organisms such as bacteria. Specification Point 1.4 - Understand the term pathogen and know that pathogens may include the following: fungi, bacteria, protoctista and viruses. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.10 - Understand the role of enzymes as biological catalysts in metabolic reactions. Specification Point 2.11 - Understand how temperature changes can affect enzyme function, including changes to the shape of the active site. Specification Point 2.12 - Practical: Investigate how enzyme activity can be affected by changes in temperature. Specification Point 2.13 - Understand how enzyme function can be affected by changes in pH altering the active site. Complete set of Chapter 1 Lessons are available

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.14B - Practical: Investigate how enzyme activity can be affected by changes in pH. Complete set of Chapter 1 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 12 - Investigating Photosynthesis. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.23 - Practical: Investigate photosynthesis, showing the evolution of oxygen from a water plant, the production of starch and the requirements of light, carbon dioxide and chlorophyll. Complete set of Chapter 2 Worksheets are available.

Complete set of PDF worksheets for Edexcel IGCSE Biology (4BI0) Chapter 2 - Nutrition and Respiration. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. All questions are original. Eight worksheets included: 10 - Nutrition in Plants 11 - The Leaf 12 - Investigating Photosynthesis 13 - Human Nutrition 14 - The Digestive System 15 - Digestion and Absorption 16 - Energy in Food 17 - Respiration

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 11 - The Leaf. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.21 - Describe the structure of the leaf and explain how it is adapted for photosynthesis. Specification Point 2.22 - Understand that plants require mineral ions for growth, and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids. Complete set of Chapter 2 Worksheets are available.