Living organisms unicellular

Any living organism consists of a varying number of cells. Whereas bacteria are unicellular, humans as the most highly developed organism consist of several billions of cells, differentiated and organized in different tissues. All these cells have some common features ... 

Living organisms range from simple unicellular organisms to sophisticated multicellular, highly organized animals such as man. Within each cell there is a complex, interactive, series of chemical reactions involving both synthesis of new molecules and breakdown of... 

Suffice it to say, that the system is ubiquitous in all forms of life, from the simple unicellular organisms to the complex tissue of the mammal. The fundamental background information of the cycle has now been established. Distribution studies indicate the universality of the enzyme systems. In the near future, the role of the glycolytic system as a function of the multitudinous activities of the living cell will reveal its true relationship to the total economy of the living organism. 

Cells all living organisms consist of cells, there exist unicellular and multicellular organisms. A typical cell size is 10 um a typical cell mass is 1 nanogram. Cells mainly consist of cytoplasm bound by a very thin membrane. This membrane serves also as a protection against the environment. There exist basically two types of cells prokaryotic and eukaryotic. The prokaryotic cells are simpler than the eukaryotic, they contain no nucleus. Bacteria are prokaryotic. The first cells appeared on Earth up to 3.8 billion years ago (see e.g. Mojzsis et al. 1996 [234]). 

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