the dried excrement of fish-eating sea birds, deposited in rocky coastal regions of South America: contains the urates, oxalates, and phosphates of ammonium and calcium; used as a fertilizer.
In prokaryotes there is only one rather simple type of cell division, which produces two identical daughter cells from one progenitor cell. This is asexual cell division, since it involves no sexual union of different individuals.
Multipotent stem cells are partially differentiated, so that they form a limited number of tissue types. Multipotent cells produce only cells of a closely related family of cells (e.g. Hematopoietic stem cells differentiate into red blood cells, white blood cells, platelets, etc.).ifferentiation of HSCs to lineage specific primitive progenitor cells like Myeloid stem cells (IL-3 and GMCSF) or Lymphoid stem cells (IL-3), permit proliferation of the committed progenitor cells into other categories of major marrow cells. The various progenitor cells are identified by the type of colony they form.