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.
The biggest similarity between them is that they both contain cell. A unicellular organism only has one cell, a multicellular organism has many cells. Multicellular organisms have specialized cells to carry out different jobs (ie.humans have cardiac muscle cells in the heart, and nervous cells in the brain).est Answer: unicellular (bacteria and some eukaryotes) and multicellular organisms (like us) both have the basic unit of life, the cell.