Cells ( plant and animal cell). Physiological processes in the cell: respiration, fermentation, photosynthesis (aerobic and anaerobic condition). Tissue and organs (plant and animal organisms). Decomposers, the mineralization process. Biological processes in the water. Biological processes in soil. Reproduction and inheritance mechanisms (basic rules of inheritance, the organization and the transfer of genetic material, changes in genetic material and gene mutations). Biodiversity: genetic, species and ecosystem. Ecosystem: actions, reactions and co-actions. Development and evolution of ecosystems (ecosystem succession and transformations). Living area. The area of seas and oceans. The area of inland water (standing water, running water and groundwater). Terrestrial area of life. Practical lessons: audio-visual methods will be used to explain biological process in the environment as well as specific examples of living area and of their characteristic communities.