Introduction to Biology. Unit 1 Cells: Essential Chemistry for Biology; The Molecules of Life; A Tour of the Cell; The Working Cell; Cellular Respiration - Harvesting Chemical Energy; Photosynthesis - Converting Light Energy to Chemical Energy. Unit 2 Genetics: The Cellular Basis of Reproduction and Inheritance; Patterns of Inheritance; Molecular Biology of the Gene; Gene Regulation - Differentiation, Stem Cells, Cloning and Cancer; DNA Technology. Unit 3 Evolution And Diversity: How Populations Evolve; How Biological Diversity Evolves; The Evolution of Microbial Life; Plants, Fungi and the Move onto Land; The Evolution of Animals. Unit 4 Ecology: Population Ecology; Communities and Ecosystems; Human Impact on the Environment. Unit 5 Animal Structure And Function: Unifying Concepts of Animal Structure and Function; Nutrition and Digestion; Circulation and Respiration; Immunology; Hormones; Reproduction and Development; Nervous, Sensory and Motor Systems. Unit 6 Plant Structure And Function: The Life of a Plant; The Working Plant.