Although cell division and growth occur throughout the liver, other organs have a special population of cells, called stem cells, that retain the capacity for cell division.
A third cellular layer, the epicardium, which covers the outside of the myocardium, develops from an extracardiac population of cells called the pro-epicardium.
Data from several studies have shown that tumors contain a small population of cells called cancer stem cells or side population cells that can recapitulate the original tumors [40], [41].
A novel theory in the field of tumour biology postulates that the capacity to maintain tumour formation and growth is found in a small population of cells, called tumour-initiating cells or cancer stem cells.
In the last few years, a growing body of evidence has been reported supporting the notion that the capability to sustain tumor formation and growth exclusively resides in a small population of cells called cancer stem cells (CSCs).
Progenitor cell maintenance at late developmental stages is also dependent upon Hedgehog (Hh) signaling from a small population of cells called the posterior signaling center that functions as a hematopoietic niche (PSC) (Lebestky et al., 2003; Jung et al., 2005).
As big as Rhode Island and Connecticut combined, the park is home to the world's largest protected population of grizzlies, called brown bears in coastal Alaska.
In this algorithm, there is a population of agents called swarms (or particles) interacting with other agents – like our algorithm.
Let us suppose that there are two genetically distinct morphs in a population of moths, call them Light and Dark.
Overwhelmingly, the mobile population of travelers call the other half of the world their permanent home.
The GA-MLHD methodology uses an initial random population of models (called chromosomes) and evolves from them highly accurate classifiers using a process that mimics natural selection.
