Erythropoiesis. The process through which new red blood cells are created; it begins in the bone marrow. Mentioned in: Porphyrias. the formation of red blood cells (erythrocytes) from stem cells in the bone marrow.
2 Unicelluar organisms are one-celled organisms or microorganisms. Although they are living things that are only one cell, they still need to carry out all 6 characteristics of life. For example, they must feed, digest, excrete wastes and reproduce. They are very small and surround you every day by the millions.
A unicellular organism and a multicellular organism are different because, those that are unicellular consist of only a single cell. Those cells are very simple because they lack a nuclei and their DNA is not separated from the rest of the cell.Any injury or death of cell in unicellular organism leads to death's. multicellular organism is an organism made up of more than one cell, such as you, me, dogs, cats, birds, bugs, etc. They are complex. They are much much bigger than uinicell â¦ ular organisms and have more body functions. A unicellular organism (also called single cell organism) is an organism made up of only one cell.