Invitation to biology -- Principles of cellular life: Life\'s chemical basis; Molecules of life; How cells work; Where it starts, photosynthesis; How cells release chemical energy -- Principles of inheritance: How cells reproduce; Meiosis and sexual reproduction; Observing patterns in inherited traits; Chromosomes and human genetics; DNA structure and function; Controls over genes; Studying and manipulating genomes -- Principles of evolution: Evolutionary patterns, rates, and trends; The origin and early evolution of life -- Evolution and biodiversity: Prokaryotes and viruses; The simplest eukaryotes, protists and fungi; Plant evolution; Animal evolution, the invertebrates; Animal evolution, the vertebrates; Plants and animals, common challenges -- How plants work: Plant tissues; Plant nutrition and transport; Plant reproduction and development -- How animals work: Animal tissues and organ systems; Neural control; Sensory perception; Endocrine control; How animals move; Circulation; Immunity; Respiration; Digestion and human nutrition; The internal environment; Animal reproduction and development -- Principles of ecology: Population ecology; Community structure and biodiversity; Ecosystems; Biosphere; Behavioral ecology.