The document discusses nutrition in animals and plants. It outlines the key types of nutrients including carbohydrates, proteins, fats, vitamins and minerals. It describes the roles and food sources of important vitamins like Vitamin A, B1, B2, B7, B12, C, D and E. It also discusses the roles and deficiency symptoms of key minerals like calcium, phosphorus, iron, iodine, sodium and potassium. The document also introduces the concepts of autotrophic and heterotrophic nutrition as well as different types of nutrition like holozoic, saprophytic and parasitic. It provides examples of food chains and enumerates some common plant diseases.