Companion PDF worksheet for Edexcel IGCSE Biology Lecture 23 - The Blood. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.59 - Describe the composition of the blood: red blood cells, white blood cells, platelets and plasma. Specification Point 2.60 - Understand the role of plasma in the transport of carbon dioxide, digested food, urea, hormones and heat energy. Specification Point 2.61 - Understand how adaptations of red blood cells make them suitable for the transport of oxygen, including shape, the absence of a nucleus and the presence of haemoglobin. Specification Point 2.62 - Understand how the immune system responds to disease using white blood cells, illustrated by phagocytes ingesting pathogens and lymphocytes releasing antibodies specific to the pathogen. Complete set of Chapter 3 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 26 - The Circulatory System. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.68 - Understand how the structure of arteries, veins and capillaries relate to their function. Specification Point 2.69 - Understand the general structure of the circulation system, including the blood vessels to and from the heart and lungs, liver and kidneys. Complete set of Chapter 3 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.40B - Understand the role of diffusion in gas exchange. Specification Point 2.41B - Understand gas exchange in relation to respiration and photosynthesis. Specification Point 2.42B - Understand how the structure of the leaf is adapted for gas exchange. Specification Point 2.43B - Describe the role of stomata in gas exchange. Complete set of Chapter 3 Lessons are available.

Companion PDF worksheet for Companion PDF worksheet for Edexcel IGCSE Biology Lecture 24 - Vaccination. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. 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 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.59 - Describe the composition of the blood: red blood cells, white blood cells, platelets and plasma. Specification Point 2.60 - Understand the role of plasma in the transport of carbon dioxide, digested food, urea, hormones and heat energy. Specification Point 2.61 - Understand how adaptations of red blood cells make them suitable for the transport of oxygen, including shape, the absence of a nucleus and the presence of haemoglobin. Specification Point 2.62 - Understand how the immune system responds to disease using white blood cells, illustrated by phagocytes ingesting pathogens and lymphocytes releasing antibodies specific to the pathogen. Complete set of Chapter 3 Lessons 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

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 9 - Movement Across Membranes. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.15 - Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells. Specification Point 2.16 - Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient. Specification Point 2.17 - Practical: Investigate diffusion and osmosis using living and non-living systems. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 5 - Biological Molecules. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 2.7 - Identify the chemical elements present in carbohydrates, proteins and lipids. Specification Point 2.8 - Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.2 - The heart and blood vessels. Complete set of Chapter 2 Lectures 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.

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 57 - Crop Production. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 5.1 - Describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops. Specification Point 5.2 - Understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses. Specification Point 5.3 - Understand how the use of fertiliser can increase crop yield. Specification Point 5.4 - Understand the reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 5.5 - Understand the role of yeast in the production of food including bread. Specification Point 5.6 - Practical: investigate the role of anaerobic respiration by yeast in different conditions. Specification Point 5.7 - Understand the role of bacteria (Lactobacillus) in the production of yoghurt. Specification Point 5.8 - Understand the use of an industrial fermenter and explain the need to provide suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum temperature and pH, oxygenation and agitation, for the growth of microorganisms. Complete set of Chapter 7 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 5.1 - Describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops. Specification Point 5.2 - Understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses. Specification Point 5.3 - Understand how the use of fertiliser can increase crop yield. Specification Point 5.4 - Understand the reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants. Complete set of Chapter 7 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 5.17B - Describe the process of micropropagation (tissue culture) in which explants are grown in vitro. Specification Point 5.18B - Understand how micropropagation can be used to produce commercial quantities of genetically identical plants with desirable characteristics. Specification Point 5.19B - Describe the stages in the production of cloned mammals involving the introduction of a diploid nucleus from a mature cell into an enucleated egg cell, illustrated by Dolly the sheep. Complete set of Chapter 7 Lessons are available.

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.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 53 - The Carbon Cycle. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.10 - Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Plant tissues. Specification Point 4.2.3.2 - Plant organ systems. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.6.1.6 - Genetic inheritance. Specification Point 4.6.1.7 - Inherited disorders. Specification Point 4.6.1.8 - Sex determination. Specification Point 4.6.3.3 - The understanding of genetics. Complete set of Chapter 6 Lectures are available.