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.
An organism, which are composed of only one single cell and are smaller and simpler when compared to multicellular organism. Unicellular organisms carry out all specialized functions within a single cell. The lives, which cannot be seen with the naked eye, are unicellular organisms. Examples of unicellular organism. A multi cellular organisms includes all organisms from Plantae and Animalia kingdoms-fish, man, tiger, horse, cow, dog, sheep, snakes, whale, elephant, mango tree, rose, plant, herbs, etc. Examples of multicellular organism.