Technology of storage and primary processing of agricultural products

Structural levels of life.
Scientists distinguish several structural levels of life: molecular, cell, tissue, organ, organism, population species, biogeocenotic, biosphere.
The mechanisms of evolution range from the molecular level of life to the biosphere level. However, the main evolutionary phenomena are observed at the molecular, cell, organism, population-species, and biogeocenotic levels. For example, the levels of the structure of life in a plant are studied in the following order: Plant (organism) - leaf (organ) - assimilation - cell - cell tissue organoid (mitochondria) - ultrastructure - molecular structure - structural protein.
1. Molecular level is the deepest level of the structure of life, consisting of molecules of organic substances - proteins, nucleic acids, carbohydrates, fats. It is at this structural level that the most important processes of the organism's vital activity begin: metabolism and energy exchange, the transmission of genetic information, and so on.
2. The cell is a structural and functional unit, as well as a unit of reproduction and development of all different organisms. There is no non-cellular form of life, the presence of viruses confirms this rule, as they exhibit the characteristics of living systems only within the cell.
3. Tissue - cells and intercellular substances with a similar structure. The cell structure and intercellular substances (similar) that are combined to perform a common function are the sum of the cells.
4. Organ - In most animals, an organ is a structural and functional combination of several types of tissue. For example, human skin as an organ includes epithelium and connective tissue, which together perform a number of functions. The most important of them is protection.
5. The organism . A whole single-celled or multicellular living system capable of living independently.
A multicellular organism is made up of a collection of tissues and organs that specialize in performing various functions.