| PenetrancePenetrance is a term used in genetics that describes the extent to which the properties controlled by a gene, its phenotype, will be expressed. A highly penetrant gene will express itself almost regardless of the effects of environment, whereas a gene wit | Peer pressurePeer pressure comprises a set of group dynamics whereby a group in which one feels comfortable may override personal habits, individual moral inhibitions or idiosyncratic desires to impose a group norm of attitudes and/or behaviors. Popular usage associat | Percy WeasleyPercy Ignatius Weasley is a fictional character in the Harry Potter series. He is a son of Arthur Weasley and Molly Weasley, a younger brother of Bill Weasley and Charlie Weasley, and an older brother of Fred Weasley, George Weasley, Ron Weasley, and Ginn |
| PeristalsisPeristalsis is the process of involuntary wave-like successive muscular contractions by which food is moved through the digestive tract. The large, hollow organs of the digestive system contain muscle that enables their walls to move. The movement of orga | Peter BarlowPeter Barlow ( 1776 March 1, 1862) was an English writer on pure and applied mathematics. Barlow was born in Norwich. In 1806 he was appointed mathematical master in the Royal Military Academy in Woolwich, south-east London, and he filled that post for 41 | Perpetual studentA perpetual student also known as professional student is a college or university attendee who re-enrolls for several years, typically more than what is necessary to obtain a given degree. Reasons for such behavior include time constraints (inability to d |
| Pepper sprayPepper spray is a less-lethal chemical agent which is used in riot control and personal self-defense. The active ingredient in pepper spray is capsaicin, which is a chemical derived from the fruit of plants in the Capsicum genus, including chiles. Pepper | Peter GarrettPeter Garrett (born 1953), Australian musician and politician, was elected to the Australian House of Representatives as the Australian Labor Party candidate in the Division of Kingsford Smith, New South Wales, at the 2004 federal election. He was a rock | PepingenPepingen is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Beert, Bellingen, Bogaarden, Elingen, Heikruis and Pepingen proper. On January 1st, 2004 Pepingen had a total population of 4,331 (2,156 |
