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 5.10 - Understand how selective breeding can develop plants with desired characteristics. Specification Point 5.11 - Understand how selective breeding can develop animals with desired characteristics. Complete set of Chapter 7 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 3.11 - 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 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 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 4.4.2.1 - Aerobic and anaerobic respiration. Specification Point 4.4.2.2 - Response to exercise. Specification Point 4.4.2.3 - Metabolism. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.5.1 - Homeostasis. Specification Point 4.5.2.4 - Control of body temperature. 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 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 4.5.2.1 - Structure and function of the human nervous system. Complete set of Chapter 5 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 4.5.2.3 - The eye. Complete set of Chapter 5 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 4.1.2.1 - 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 4.1.3.1 - 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 2.29 - Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases. Specification Points 2.30 and 2.31 - Understand that bile is produced by the liver and stored in the gallbladder. Understand the role of bile in neutralising stomach acid and emulsifying lipids. Specification Point 2.32 - Understand how the small intestine is adapted for absorption, including the structure of a villus. 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.