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Boys
A boy is a young male human. The term is commonly used for a child or an adolescent. When a male human reaches adulthood, he is described as a man. Definition, etymology, and use According to the ''Merriam-Webster Dictionary'', a boy is "a male child from birth to adulthood". The word "boy" comes from Middle English ''boi, boye'' ("boy, servant"), related to other Germanic words for ''boy'', namely East Frisian ''boi'' ("boy, young man") and West Frisian ''boai'' ("boy"). Although the exact etymology is obscure, the English and Frisian forms probably derive from an earlier Anglo-Frisian *''bō-ja'' ("little brother"), a diminutive of the Germanic root *''bō-'' ("brother, male relation"), from Proto-Indo-European *''bhā-'', *''bhāt-'' ("father, brother"). The root is also found in Norwegian dialectal ''boa'' ("brother"), and, through a reduplicated variant *''bō-bō-'', in Old Norse ''bófi'', Dutch ''boef'' "(criminal) knave, rogue", German ''Bube'' ("knave, rogu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anglo-Saxon Language
Old English (, ), or Anglo-Saxon, is the earliest recorded form of the English language, spoken in England and southern and eastern Scotland in the early Middle Ages. It was brought to Great Britain by Anglo-Saxon settlers in the mid-5th century, and the first Old English literary works date from the mid-7th century. After the Norman conquest of 1066, English was replaced, for a time, by Anglo-Norman (a relative of French) as the language of the upper classes. This is regarded as marking the end of the Old English era, since during this period the English language was heavily influenced by Anglo-Norman, developing into a phase known now as Middle English in England and Early Scots in Scotland. Old English developed from a set of Anglo-Frisian or Ingvaeonic dialects originally spoken by Germanic tribes traditionally known as the Angles, Saxons and Jutes. As the Germanic settlers became dominant in England, their language replaced the languages of Roman Britain: Common Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cell (biology)
The cell is the basic structural and functional unit of life forms. Every cell consists of a cytoplasm enclosed within a membrane, and contains many biomolecules such as proteins, DNA and RNA, as well as many small molecules of nutrients and metabolites.Cell Movements and the Shaping of the Vertebrate Body in Chapter 21 of Molecular Biology of the Cell '' fourth edition, edited by Bruce Alberts (2002) published by Garland Science. The Alberts text discusses how the "cellular building blocks" move to shape developing embryos. It is also common to describe small molecules such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sperm
Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while some red algae and fungi produce non-motile sperm cells, known as spermatia. Flowering plants contain non-motile sperm inside pollen, while some more basal plants like ferns and some gymnosperms have motile sperm. Sperm cells form during the process known as spermatogenesis, which in amniotes ( reptiles and mammals) takes place in the seminiferous tubules of the testes. This process involves the production of several successive sperm cell precursors, starting with spermatogonia, which differentiate into spermatocytes. The spermatocytes then undergo meiosis, reducing their chromosome number by half, which produces spermatids. The spermatids then mature and, in animals, construct a tail, or flagellum, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygote
A zygote (, ) is a eukaryotic cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information of a new individual organism. In multicellular organisms, the zygote is the earliest developmental stage. In humans and most other anisogamous organisms, a zygote is formed when an egg cell and sperm cell come together to create a new unique organism. In single-celled organisms, the zygote can divide asexually by mitosis to produce identical offspring. German zoologists Oscar and Richard Hertwig made some of the first discoveries on animal zygote formation in the late 19th century. Humans In human fertilization, a released ovum (a haploid secondary oocyte with replicate chromosome copies) and a haploid sperm cell (male gamete) combine to form a single diploid cell called the zygote. Once the single sperm fuses with the oocyte, the latter completes the division of the second ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and noncoding genes. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertilization
Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes to give rise to a new individual organism or offspring and initiate its development. Processes such as insemination or pollination which happen before the fusion of gametes are also sometimes informally called fertilisation. The cycle of fertilisation and development of new individuals is called sexual reproduction. During double fertilisation in angiosperms the haploid male gamete combines with two haploid polar nuclei to form a triploid primary endosperm nucleus by the process of vegetative fertilisation. History In Antiquity, Aristotle conceived the formation of new individuals through fusion of male and female fluids, with form and function emerging gradually, in a mode called by him as epigenetic. In 1784, Spallanzani established the need of interaction between the female's ovum and male's sperm to form a zygote in frog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andre Ward
Andre Michael Ward (born February 23, 1984) is an American former professional boxer who competed from 2004 to 2017. He retired with an undefeated record and held multiple world titles in two weight classes, including the unified WBA (Super), WBC, ''Ring'' magazine, and lineal super middleweight titles between 2009 and 2015; and the unified WBA (Undisputed), IBF, WBO, and ''Ring'' light heavyweight titles between 2016 and 2017. During his reign as light heavyweight champion, Ward was ranked as the world's best active boxer, pound for pound, by ''The Ring'' magazine and the Transnational Boxing Rankings Board (TBRB), as well as the world's best active boxer in the division by ''The Ring'', the TBRB, and BoxRec. As of January 2022, BoxRec ranks Ward as the twelfth greatest fighter of all time, pound for pound. As an amateur, Ward won a gold medal in the light heavyweight division at the 2004 Olympics and turned professional later that year. He rose to worldwide promine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conor McGregor
Conor Anthony McGregor ( ga, Conchúr Antóin Mac Gréagóir; born 14 July 1988) is an Irish professional mixed martial artist. He is a former Ultimate Fighting Championship (UFC) featherweight and lightweight double-champion. He is the first UFC fighter to hold UFC championships in two weight classes simultaneously. He is also the former Cage Warriors featherweight and lightweight champion. In his debut professional boxing match, he was defeated by Floyd Mayweather Jr. He is the biggest pay-per-view (PPV) draw in MMA history, having headlined the five highest-selling UFC pay-per-view events. His bout with Khabib Nurmagomedov at UFC 229 drew 2.4 million PPV buys, the most ever for an MMA event. His boxing match with Mayweather drew 4.3 million PPV buys in North America, the second most in combat sports history. McGregor was ranked as the world's highest-paid athlete by ''Forbes'' in 2021, earning a reported $180 million. He also featured in the list in 2018, when he was ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floyd Mayweather Jr
Floyd Joy Mayweather Jr. ('' né'' Sinclair; February 24, 1977) is an American boxing promoter and former professional boxer. He currently owns a team in the NASCAR Cup Series named The Money Team Racing. As a professional boxer he competed between 1996 and 2017, retiring with an undefeated record and winning 15 major world championships from super featherweight to light middleweight. This includes the ''Ring'' magazine title in five weight classes and the lineal championship in four weight classes (twice at welterweight). As an amateur boxer, he won a bronze medal in the featherweight division at the 1996 Olympics, three U.S. Golden Gloves championships (at light flyweight, flyweight, and featherweight), and the U.S. national championship at featherweight. Mayweather was named "Fighter of the Decade" for the 2010s by the Boxing Writers Association of America (BWAA), a two-time winner of ''The Ring'' magazine's Fighter of the Year award (1998 and 2007), a three-ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geoff Davis
Geoffrey Clark Davis (born October 26, 1958) is an American businessman, politician and former U.S. Representative for , serving from 2005 to 2012. He is a member of the Republican Party. The district includes 24 counties in the northeastern part of the state, stretching from the fringes of the Louisville area to the West Virginia border. Most of its vote, however, is cast in the counties bordering Cincinnati. On December 15, 2011, Davis announced he would not seek reelection in 2012. On July 31, 2012, he announced his resignation from Congress effective immediately. Early life, education, and business career Davis was born in Montreal, Quebec, Canada to American parents. After graduating from high school, he enlisted in the United States Army and later received an appointment to the United States Military Academy at West Point. At West Point, Davis studied national security and international affairs, as well as the Arabic language. In the U.S. Army he served as an aviation offi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chris Christie
Christopher James Christie (born September 6, 1962) is an American politician, lawyer, political commentator, lobbyist, and former federal prosecutor who served as the 55th governor of New Jersey from 2010 to 2018. Christie, who was born in Newark, New Jersey, was raised in Livingston, New Jersey. After graduating in 1984 from the University of Delaware, he earned a J.D. at Seton Hall University School of Law. A Republican, Christie was elected county freeholder (legislator) for Morris County, New Jersey, serving from 1995 to 1998. By 2002, he had campaigned for Presidents George H. W. Bush and George W. Bush; the latter appointed him U.S. Attorney for New Jersey, a position he held from 2002 to 2008. Christie won the 2009 Republican primary for Governor of New Jersey and defeated Democratic incumbent Jon Corzine in the general election. In his first term, he was credited with cutting spending, capping property tax growth and engaging in recovery efforts after Hurricane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
