The world around is included set of natural and anthropogenic objects which coexist throughout all human history. But to break balance in the nature very easily. And first of all various biosystems suffer from it. What means under this concept?
The biosystem is set of all living organisms in general. But it is extremely heavy to consider it in such section therefore the biosystem can be divided into various levels of the organization of live matter. Main levels seven: - molecular; - cellular; - fabric; - organismal; - population and specific; - biogeotsenoticheskiya; - biospheric. These levels join each other, forming unity of wildlife in general. At the molecular level the molecular processes happening in living cells as well as molecules in terms of their inclusion in structure of a cage are described. Molecules can form various chemical and organic compounds for ensuring activity of cages. Biospheres at this level research such sciences as biophysics, biochemistry, molecular genetics and molecular biology. Cellular level includes the simplest unicells and also sets of various cages which are parts of metaphytes. Level is a subject of studying such sciences as embryology, cytology, genetic engineering. In their framework the studying processes of biosynthesis and photosynthesis, cell fission, participation of various chemical elements and the Sun on existence of a biosystem is conducted. Fabric level is certain fabrics which unite in themselves similar in structure and to functions of a cage. To development of a metaphyte there is a natural differentiation of cages on the roles which are carried out by them. All animals possess fabrics muscular, epithelial, connecting, nervous etc. At the organismal level various multicellular plants, animals, mushrooms and also various microorganisms (including monocelled) in terms of their influence on multicellular beings coexist. The anatomy, an autekologiya, genetics, hygiene, physiology, morphology and also some other sciences are engaged in studying this level of a biosystem. At the population and specific level of a biosystem the scientists study the processes proceeding in populations and types of various living beings united among themselves by a gene pool and way of impact on the environment. In addition, at this level the problems of interaction of different types and populations are considered. The Biogeotsenozny component of a biosystem is formed by different types and populations of living beings on Earth. At this level various features and specifics of distribution of living beings across various territories are studied. At the same time creation of food networks is considered. The sciences studying this level are the biogeography and ecology. The most important and extensive level of the organization of life is biospheric where numerous communications between the person and biogeotsenozny level are studied. Together with anthropogenic influence the ecology is engaged in studying this level.