Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.5 - Understand how abiotic and biotic factors affect the population size and distribution of organism. Complete set of Chapter 6 Lessons are available.

Complete set of PDF worksheets for Edexcel IGCSE Biology (4BI0) Chapter 6 - Ecology and the Environment. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. All questions are original. Eight worksheets included: 49 - Ecosystems 50 - Biodiversity 51 - Biotic and Abiotic Factors 52 - Feeding Relationships 53 - The Carbon Cycle 54 - The Nitrogen Cycle 55 - Pollution and Global Warming 56 - Deforestation

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 55 - Pollution and Global Warming. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.12 -Understand the biological consequences of pollution of air by sulfur dioxide and carbon monoxide. Specification Point 4.13 - Understand that water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse gases. Specification Point 4.14 - Understand how human activities contribute to greenhouse gases. Specification Point 4.15- Understand how an increase in greenhouse gases results in an enhanced greenhouse effect and that this may lead to global warming and its consequences. Specification Point 4.16 - Understand the biological consequences of pollution of water by sewage. Specification Point 4.17 - Understand the biological consequences of eutrophication caused by leached minerals from fertilizer. Complete set of Chapter 6 Worksheets are available.

Complete set of PDF worksheets for Edexcel IGCSE Biology (4BI0) Chapter 7 - Use of Biological Resources. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. All questions are original. Six worksheets included: 57 - Crop Production 58 - Microorganisms for Food 59 - Fish Farming 60 - Selective Breeding 61 - Genetic Modification 62 - Cloning

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 52 - Feeding Relationships. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. 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 Worksheets are available.

Powerpoint lecture and associated PDF worksheet 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 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.5.1 - Food security. Specification Point 4.7.5.2 - Farming techniques. Specification Point 4.7.5.3 - Sustainable fisheries. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.5 - Species and taxonomy. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.2 - DNA and protein synthesis. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.5.1 - Structure of DNA and RNA. Complete set of Chapter 1 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 39 - FSH and LH. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.10B - Understand the roles of FSH and LH in the menstrual cycle. Complete set of Chapter 5 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.9B - Understand the methods used to farm large numbers of fish to provide a source of protein, including maintaining water quality, controlling intraspecific and interspecific predation, controlling disease, removing waste products, controlling the quality and frequency of feeding, and selective breeding. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.10B - Understand the roles of FSH and LH in the menstrual cycle. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.1.1 - Eukaryotes and prokaryotes. Specification Point 4.1.1.2 - Animal and plant cells. Specification Point 4.1.1.5 - Microscopy. Practical 1 - Use a light microscope to investigate a selection of plant and animal cells. Complete set of Chapter 1 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 31 - Coordination in Humans. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.86 - Describe how nervous and hormonal communication control responses and understand the differences between the two systems. Specification Point 2.87 - Understand that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves. Specification Point 2.88 - Understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses. Specification Point 2.89 - Understand the role of neurotransmitters at synapses. Complete set of Chapter 4 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 17 - Respiration. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Points 2.34 and 2.35 - Understand how the process of respiration produces ATP in living organisms. Know that ATP provides energy for cells. Specification Points 2.36 and 2.37 - Describe the differences between aerobic and anaerobic respiration. Know the word equation and the balanced chemical symbol equation for aerobic respiration in living organisms. Specification Point 2.38 - Know the word equation for anaerobic respiration in plants and in animals. Specification Point 2.39 - Practical: investigate the evolution of carbon dioxide and heat from respiring seeds or other suitable living organisms. Complete set of Chapter 2 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.31 - Understand how random fertilization produces genetic variation of offspring. Specification Point 3.32 - Know that in human cells the diploid number of chromosomes is 46 and the haploid number is 23. Specification Point 3.33 - Understand that variation within a species can be genetic, environmental, or a combination of both. Specification Point 3.34 - Understand that mutation is a rare, random change in genetic material that can be inherited. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.4.1.1 - The photosynthetic reaction. Specification Point 4.4.1.3 - Uses of glucose from photosynthesis. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.14 - Understand that the genome is the entire DNA of an organism and that a gene is a section of a molecule of DNA that codes for a specific protein. Specification Point 3.15 -Understand that the nucleus of a cell contains chromosomes on which genes are located. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.12 - Understand how restriction enzymes are used to cut DNA at specific sites and ligase enzymes are used to join pieces of DNA together. Specification Point 5.13 - Understand how plasmids and viruses can act as vectors, which take up pieces of DNA, and then insert this recombinant DNA into other cells. Specification Point 5.14 - Understand how large amounts of human insulin can be manufactured from genetically modified bacteria that are grown in a fermenter. Specification Point 5.15 - Understand how genetically modified plants can be used to improve food production. Specification Point 5.16 - Understand that the term transgenic means the transfer of genetic material from one species to a different species. Complete set of Chapter 7 Lectures are available.