生物,学习资料（Biology, learning materials）.docVIP

生物,学习资料（Biology, learning materials） The basic characteristics of a living organism; having a common physical and structural basis Metabolism Irritability Growth, development, reproduction Heredity and variation Organisms can adapt to a certain environment and affect the environment. The basic components of living organisms are proteins and nucleic acids. Proteins are the primary bearers of life. Nucleic acids are carriers of genetic information. Cells are the basic units of the structure and function of organisms. Metabolism is the general term for all ordered chemical changes in living matter. Metabolism is the basis of the organism for all life activities. Three stages of biological development: Descriptive biology, experimental biology, and molecular biology, the cellular theory, lay the foundation for the study of the structure, physiology, reproduction, and development of organisms; The origin of species plays an important role in promoting the development of modern biology; Mendel; DNA double helix structure; Bioscience development, biotechnology, medicine, agriculture, energy development and environmental vaccine manufacturing - Core: genetic engineering Insect resistant cotton; oil grass; super bacteria Material base of life Biological activities of life have a common material base Chemical elements vary greatly in different organisms and in various chemical elements. Classification: a large number of elements, trace elements Compounds are the material basis for biological activities. Chemical elements can affect the biological activities of life. The biological and non biological communities are unity and diversity Compounds, water, inorganic salts, sugars, lipids, proteins, nucleic acids. Water -- free water and combined water Ions of inorganic salts play an important role in the maintenance of biological activities. Sugars - monosaccharides, two sugars, polysaccharides. Lipids - fats, lipids, sterols Free water is a good solvent in the cell that delivers