Cell, the smallest unit of life: Chemistry and life ; Cell membrane and cell wall function ; Cell division -- Plant biology: Photosynthesis ; Plant organization and growth -- Human anatomy and physiology: Human organization ; Blood ; Respiration -- Human reproduction, development, and inheritance: Reproductive system ; Patterns of gene inheritance ; Recombinant DNA and biotechnology -- Evolution and diversity: Origin of life ; Animal kingdom -- Behavior ecology: Biosphere ; Ecosystems