Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.1.6 - Human defence systems. Specification Point 4.3.1.7 - Vaccination. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.3.1 - Detection and identification of plant diseases. Specification Point 4.3.3.2 - Plant defence responses. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.5.3.3 - Maintaining water and nitrogen balance in the body. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.5.3.1 - The human endocrine system. Specification Point 4.5.3.2 - Control of blood glucose concentration. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: 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 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.70 - Understand the origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf. Specification Point 2.71 - Know the excretory products of the lungs, kidneys and skin. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: 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 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.18 - Understand the process of photosynthesis and its importance to the conversion of light energy into chemical energy. Specification Point 2.19 - Know the word equation and balanced chemical symbol equation for photosynthesis. Specification Point 2.20 - Understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.80 - Understand how organisms are able to respond to changes in their environment. Specification Point 2.81 - Understand that homeostasis is the maintenance of a constant internal environment, and that body water content and body temperature are both examples of homeostasis. Specification Point 2.82 - Understand that a coordinated response requires a stimulus, a receptor and an effector. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1 - Understand the differences between sexual and asexual reproduction. Specification Point 3.2 - Understand that fertilization involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.95B - Understand the sources, roles and effects of the following hormones: ADH, FSH and LH. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.19 - Understand how genes exist in alternative forms called alleles which give rise to differences in inherited characteristics. Specification Point 3.20 - Understand the meaning of the terms: dominant, recessive, homozygous, heterozygous, phenotype, and genotype. Specification Point 3.21B - Understand the meaning of the term codominance. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.11 - Describe the role of the placenta in the nutrition of the developing embryo. Specification Point 3.12 - Understand how the developing embryo is protected by amniotic fluid. Specification Point 3.13 - Understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.2.1 - Chromosomes. Specification Point 4.1.2.2 - Mitosis and the cell cycle. Practical 2 - Investigate the effect of different antiseptics on bacterial growth. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.1.3 - Cell specialisation. Specification Point 4.1.1.4 - Cell differentiation. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.3.1 - Diffusion. Specification Point 4.1.3.2 - Osmosis. Practical 3 - Investigate the effect of a range of concentrations of sugar solution on the mass of plant tissue. Specification Point 4.1.3.3 - Active transport. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.1: The human digestive system. Practical 5 - Measuring the effect of pH on the rate of activity of amylase enzyme. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.3.1 - Diffusion. Complete set of Chapter 1 Lectures 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 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.