first four levels of the organization wildlife



first level of organization of life - molecular.He is represented by different molecules, which are available in the living cell.This molecule may be both organic and inorganic compounds and their complexes.At this level, biology is studying how to create molecular complexes, as well as the transmitted and inherited genetic information.What science has been studying the first level of organization of wildlife: biophysics, biochemistry, molecular biology, molecular genetics.

second level - the cell.The cell is the smallest independent unit of the structure, functioning and development of a living organism.Cell science cytology studies.The cells in the most general form can be divided into nuclear and non-nuclear, in the cell nucleus contains the genetic information.At this level, studied the metabolism
and cell energy, its life cycle.

third level - the fabric is represented by different tissues.Fabrics are composed of a plurality of cells different in structure and function.In the course of evolution, there are more species of living tissues.The animals are the following: epithelial, connective, muscle, nervous.Plants - conductive, protective, basic and meristematic.Fabrics histology studies.

fourth level - the body represented bodies of living organisms.During the evolution of the structure and the possibility of more complex.If protozoa basic functions performed by the structure of primitive organelles, then multicellular already have a complex system of organs.The bodies of living beings formed from various tissues.For example, near the attaching and connecting and striated tissue.

second four levels of organization of life



fifth level - organismal or developmental.At this level, study unicellular and multicellular organisms living beings.This level of interest of science physiology.The process of ontogenesis - the development of an organism from birth to death, it was his studying physiology.Multicellular organisms consist of various organs and tissues.Study: metabolism, structure of the body, nutrition, homeostasis, reproduction, interaction with the environment.

sixth level - population-species, species and populations represented.The object of study - a group of related species, similar in structure, genetic and interaction with the environment.This level of science involved in the evolution and population genetics.

seventh level - biogeocenotic.At this level, studied biogeocoenoses, cycling of matter and energy in them, the balance between the organism and the environment, provision of living organisms resources and conditions for existence.Eighth level - the biosphere, the biosphere is presented.Along with all the previous at this level still considered human impact on nature.