This is a shortened version of the text, "Biology", by Wessells and Hopson, focusing on the key topics commonly taught in introductory biology courses.
Atoms, molecules and life; the molecules of living things; chemical reactions, enzymes and metabolism; cells - their properties, surfaces and interconnections; inside the living cell - structure and function of internal cell parts; harvesting the energy stored in nutrients - fermentation and cellular respiration; photosynthesis; cellular reproduction; mendelian genetics; mendel-modified; the chemical nature of the gene; genes into protein; bacterial genetics, gene control and genetic engineering; human genetics; animal development.