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Vicar Of Bray (scientific Hypothesis)
The "Vicar of Bray" hypothesis (or Fisher-Muller Model) attempts to explain why sexual reproduction might have advantages over asexual reproduction. Reproduction is the process by which organisms give rise to offspring. Asexual reproduction involves a single parent and results in offspring that are genetically identical to each other and to the parent. In contrast to asexual reproduction, sexual reproduction involves two parents. Both the parents produce gametes through meiosis, a special type of cell division that reduces the chromosome number by half. During an early stage of meiosis, before the chromosomes are separated in the two daughter cells, the chromosomes undergo genetic recombination. This allows them to exchange some of their genetic information. Therefore, the gametes from a single organism are all genetically different from each other. The process in which the two gametes from the two parents unite is called fertilization. Half of the genetic information from both pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clergy
Clergy are formal leaders within established religions. Their roles and functions vary in different religious traditions, but usually involve presiding over specific rituals and teaching their religion's doctrines and practices. Some of the terms used for individual clergy are clergyman, clergywoman, clergyperson, churchman, and cleric, while clerk in holy orders has a long history but is rarely used. In Christianity, the specific names and roles of the clergy vary by denomination and there is a wide range of formal and informal clergy positions, including deacons, elders, priests, bishops, preachers, pastors, presbyters, ministers, and the pope. In Islam, a religious leader is often known formally or informally as an imam, caliph, qadi, mufti, mullah, muezzin, or ayatollah. In the Jewish tradition, a religious leader is often a rabbi (teacher) or hazzan (cantor). Etymology The word ''cleric'' comes from the ecclesiastical Latin ''Clericus'', for those belonging ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tangled Bank Hypothesis
Sexual reproduction is an adaptive feature which is common to almost all multicellular organisms and various unicellular organisms, with some organisms being incapable of asexual reproduction. Currently the adaptive advantage of sexual reproduction is widely regarded as a major unsolved problem in biology. As discussed below, one prominent theory is that sex evolved as an efficient mechanism for producing variation, and this had the advantage of enabling organisms to adapt to changing environments. Another prominent theory, also discussed below, is that a primary advantage of outcrossing sex is the masking of the expression of deleterious mutations. Additional theories concerning the adaptive advantage of sex are also discussed below. Sex does, however, come with a cost. In reproducing asexually, no time nor energy needs to be expended in choosing a mate. And if the environment has not changed, then there may be little reason for variation, as the organism may already be we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fitness (biology)
Fitness (often denoted w or ω in population genetics models) is the quantitative representation of individual reproductive success. It is also equal to the average contribution to the gene pool of the next generation, made by the same individuals of the specified genotype or phenotype. Fitness can be defined either with respect to a genotype or to a phenotype in a given environment or time. The fitness of a genotype is manifested through its phenotype, which is also affected by the developmental environment. The fitness of a given phenotype can also be different in different selective environments. With asexual reproduction, it is sufficient to assign fitnesses to genotypes. With sexual reproduction, recombination scrambles alleles into different genotypes every generation; in this case, fitness values can be assigned to alleles by averaging over possible genetic backgrounds. Natural selection tends to make alleles with higher fitness more common over time, resulting in Darwin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Weismann
August Friedrich Leopold Weismann FRS (For), HonFRSE, LLD (17 January 18345 November 1914) was a German evolutionary biologist. Fellow German Ernst Mayr ranked him as the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the first Professor of Zoology at Freiburg. His main contribution involved germ plasm theory, at one time also known as Weismannism,Romanes, George John. ''An examination of Weismannism''. The Open court publishing company in Chicago 189/ref> according to which inheritance (in a multicellular animal) only takes place by means of the germ cells—the gametes such as egg cells and sperm cells. Other cells of the body—somatic cells—do not function as agents of heredity. The effect is one-way: germ cells produce somatic cells and are not affected by anything the somatic cells learn or therefore any ability an individual acquires during its life. Genetic information c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turncoat
A turncoat is a person who shifts allegiance from one loyalty or ideal to another, betraying or deserting an original cause by switching to the opposing side or party. In political and social history, this is distinct from being a traitor, as the switch mostly takes place under the following circumstances: *In groups, often driven by one or more leaders. *When the goal that formerly motivated and benefited the person becomes (or is perceived as having become) either no longer feasible or too costly even if success is achieved. From a military perspective, opposing armies generally wear uniforms of contrasting colors to prevent incidents of friendly fire. Thus the term "turn-coat" indicates that an individual has changed sides and his uniform coat to one matching the color of his former enemy. For example, in the English Civil War during the 17th century, Oliver Cromwell's soldiers turned their coats inside out to match the colors of the Royal army (see Examples below). Historic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windsor, Berkshire
Windsor is a historic market town and unparished area in the Royal Borough of Windsor and Maidenhead in Berkshire, England. It is the site of Windsor Castle, one of the official residences of the British monarch. The town is situated west of Charing Cross, central London, southeast of Maidenhead, and east of the county town of Reading. It is immediately south of the River Thames, which forms its boundary with its smaller, ancient twin town of Eton. The village of Old Windsor, just over to the south, predates what is now called Windsor by around 300 years; in the past Windsor was formally referred to as New Windsor to distinguish the two. Etymology ''Windlesora'' is first mentioned in the ''Anglo-Saxon Chronicle.'' (The settlement had an earlier name but this is unknown.) The name originates from old English ''Windles-ore'' or ''winch by the riverside''.South S.R., ''The Book of Windsor'', Barracuda Books, 1977. By 1110, meetings of the Great Council, which had previousl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papist
The words Popery (adjective Popish) and Papism (adjective Papist, also used to refer to an individual) are mainly historical pejorative words in the English language for Roman Catholicism, once frequently used by Protestants and Eastern Orthodox Christians to label their Roman Catholic opponents, who differed from them in accepting the authority of the Pope over the Christian Church. The words were popularised during the English Reformation (1532–1559), when the Church of England broke away from the Roman Catholic Church and divisions emerged between those who rejected Papal authority and those who continued to follow Rome. The words are recognised as pejorative; they have been in widespread use in Protestant writings until the mid-nineteenth century, including use in some laws that remain in force in the United Kingdom. ''Popery'' and ''Papism'' are sometimes used in modern writing as dog whistles for anti-Catholicism or as pejorative ways of distinguishing Roman Catholicism f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bray, Berkshire
Bray, occasionally Bray on Thames, is a large suburban village and civil parish in the English county of Berkshire. It sits on the banks of the River Thames, to the southeast of Maidenhead of which it is a suburb. The village is mentioned in the comedic song "The Vicar of Bray". Bray contains two of the eight three-Michelin-starred restaurants in the United Kingdom and has several large business premises including Bray Studios at Water Oakley, where the first series of Hammer Horror films were produced. Geography The civil parish of Bray is far larger than the village itself and includes a number of other villages and hamlets over an area of . It had a population of 8,425 at the 2001 census, increasing to 9,110 at the 2011 census. Bray is a large parish, although its area has shrunk considerably since Maidenhead was detached. As well as the village, the parish contains a large number of villages and hamlets, often greens, which were originally scattered amongst the remai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Lewis (publisher)
Samuel Lewis (c. 1782 – 1865) was the editor and publisher of topographical dictionaries and maps of the United Kingdom of Great Britain and Ireland. The aim of the texts was to give in 'a condensed form', a faithful and impartial description of each place. The firm of Samuel Lewis and Co. was based in London. Samuel Lewis the elder died in 1865. His son of the same name predeceased him in 1862. ''A Topographical Dictionary of England'' This work contains every fact of importance tending to illustrate the local history of England. Arranged alphabetically by place (village, parish, town, etc.), it provides a faithful description of all English localities as they existed at the time of first publication (1831), showing exactly where a particular civil parish was located in relation to the nearest town or towns, the barony, county, and province in which it was situated, its principal landowners, the diocese in which it was situated, and—of novel importance—the Roman Catholic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Fuller
Thomas Fuller (baptised 19 June 1608 – 16 August 1661) was an English churchman and historian. He is now remembered for his writings, particularly his ''Worthies of England'', published in 1662, after his death. He was a prolific author, and one of the first English writers able to live by his pen (and his many patrons).Stephen, Leslie (1889). "Thomas Fuller". In ''Dictionary of National Biography''. 20. London. pp. 315-320. Early life Fuller was the eldest son of Thomas Fuller, rector of Aldwinkle St Peter's, Northamptonshire. He was born at his father's rectory and was baptised on 19 June 1608. Dr John Davenant, bishop of Salisbury, was his uncle and godfather. According to John Aubrey, Fuller was "a boy of pregnant wit". At thirteen he was admitted to Queens' College, Cambridge, then presided over by John Davenant. His cousin, Edward Davenant, was a tutor there. He did well academically; and in Lent 1624–1625 he became B.A. and in July 1628, at only 20 years of age, rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simon Aleyn
Simon Aleyn (or Alleyn; died 17 October 1565) was a Canon of Windsor from 1559–63 He was educated in Oxford and graduated BA 1539, MA 1542. He was appointed: *Vicar of Cookham 1553 *Vicar of Strathfieldsaye 1559 He was also Vicar of St Michael's Church, Bray, Berkshire and, according to Thomas Fuller and Richard Brome, is the likely subject of the famous ballad, "The Vicar of Bray The Vicar of Bray is a satirical description of an individual fundamentally changing his principles to remain in ecclesiastical office as external requirements change around him. The religious upheavals in England from 1533 to 1559 (and then from ...". He was also thought to be the subject of a subsequent comic opera of the same name (written by Sydney Grundy, with music by Edward Solomon), but that opera makes no mention of Aleyn, and its text indicates that the character is actually vicar of Stanford-on-Avon and attached to the Lords of Bray whose family seat is at Stanford Hall. Mention of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
