Table of Contents

* What is an ecosystem? * Energy flow and cycling of matter * Naming ecosystems, communities and individuals * Population distribution and abundance * Natural change * Human influence * Units of life * Cells at work * Getting energy * Nutrition * Gas exchange * Transport systems * Waste removal * Regulatory mechanisms * Internal stability * Reproduction and development * Mammalian reproduction and biotechnology * Parasites and pathogens * Defence against disease * Chromosomes, genes and DNA * Passing on genes * Evidence for evolution * Mechanisms of evolution * Change over geological time.