stream/download this segment as an MP3 file. A small section of Pando. (Photo: Paul C. Rogers, Western Aspen Alliance). The worldâs largest and possibly oldest living organism is Pando, a Quaking Aspen clone in Utah.Karen Mock, Professor of Molecular Ecology at Utah State University tells host Steve Curwood that precise estimates about the age of Pando are not currently possible, but it may be many thousands of years old.hat means it started sprouting when modern humans were migrating out of Africa. But the worldâs largest organism is now under threat. Here to explain why are Paul Rogers, Director of the Western Aspen Alliance at Utah State University and Karen Mock, Professor of Conservation Genetics and Molecular Ecology at USU.
When a cell is submerged in water, the water molecules pass through the cell membrane from an area of low solute concentration to high solute concentration. For example, if the cell is submerged in saltwater, water molecules move out of the cell.If a cell is submerged in freshwater, water molecules move into the cell.smosis is the movement of a solvent across a semipermeable membrane toward a higher concentration of solute. In biological systems, the solvent is typically water, but osmosis can occur in other liquids, supercritical liquids, and even gases.
A solution with low osmolarity has a greater number of water molecules relative to the number of solute particles; a solution with high osmolarity has fewer water molecules with respect to solute particles.