The cell nucleus is one of the largest organelles found in cells and also plays an important biological role. It composes about 10% of the total volume of the cell and is found near the center of eukaryotic cells. Its importance lies in its function as a storage site for DNA, our genetic material.
A monorail is a railway in which the track consists of a single rail. The term is also used to describe the beam of the system, or the vehicles traveling on such a beam or track.
The Underground Railroad was a term used for a network of people, homes, and hideouts that slaves in the southern United States used to escape to freedom in the Northern United States and Canada.he Underground Railroad used railroad terms in its organization. People who led the slaves along the route were called conductors. Hideouts and homes where slaves hid along the way were called stations or depots.