Estonia has been extremely successful in its re-integration with Europe. We joined the European Union in 2004, and slightly less than 7 years later (namely on 1 January 2011), we have adopted the common currency of the European Union â the euro.
When cells divide, they make new cells. A single cell divides to make two cells and these two cells then divide to make four cells, and so on. We call this process cell division and cell reproduction, because new cells are formed when old cells divide. The ability of cells to divide is unique for living organisms.n cell division, the cell that is dividing is called the parent cell. The parent cell divides into two daughter cells. The process then repeats in what is called the cell cycle. Cells regulate their division by communicating with each other using chemical signals from special proteins called cyclins.
The main concept of cell theory is that cells are the basic structural unit for all organisms. Cells are small compartments that hold the biological equipment necessary to keep an organism alive and successful. Living things may be single-celled or they may be very complex such as a human being. The first cells to appear on Earth were prokaryotic cells. A prokaryote is an organism made of a single prokaryotic cell also called single-celled organisms. The earliest prokaryotes may have arisen more than 2.5 billion years ago. âProâ means