David Male Popular Books
David Male Biography & Facts
Male (symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the process of fertilisation. A male organism cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually. Most male mammals, including male humans, have a Y chromosome, which codes for the production of larger amounts of testosterone to develop male reproductive organs. In humans, the word male can also be used to refer to gender, in the social sense of gender role or gender identity. The use of "male" in regard to sex and gender has been subject to discussion. Overview The existence of separate sexes has evolved independently at different times and in different lineages, an example of convergent evolution. The repeated pattern is sexual reproduction in isogamous species with two or more mating types with gametes of identical form and behavior (but different at the molecular level) to anisogamous species with gametes of male and female types to oogamous species in which the female gamete is very much larger than the male and has no ability to move. There is a good argument that this pattern was driven by the physical constraints on the mechanisms by which two gametes get together as required for sexual reproduction. Accordingly, sex is defined across species by the type of gametes produced (i.e.: spermatozoa vs. ova) and differences between males and females in one lineage are not always predictive of differences in another. Male/female dimorphism between organisms or reproductive organs of different sexes is not limited to animals; male gametes are produced by chytrids, diatoms and land plants, among others. In land plants, female and male designate not only the female and male gamete-producing organisms and structures but also the structures of the sporophytes that give rise to male and female plants. Evolution The evolution of anisogamy led to the evolution of male and female function. Before the evolution of anisogamy, mating types in a species were isogamous: the same size and both could move, catalogued only as "+" or "-" types.: 216 In anisogamy, the mating type is called a gamete. The male gamete is smaller than the female gamete, and usually mobile. Anisogamy remains poorly understood, as there is no fossil record of its emergence. Numerous theories exist as to why anisogamy emerged. Many share a common thread, in that larger female gametes are more likely to survive, and that smaller male gametes are more likely to find other gametes because they can travel faster. Current models often fail to account for why isogamy remains in a few species. Anisogamy appears to have evolved multiple times from isogamy; for example, female Volvocales (a type of green algae) evolved from the plus mating type.: 222 Although sexual evolution emerged at least 1.2 billion years ago, the lack of anisogamous fossil records make it hard to pinpoint when males evolved. One theory suggests male evolved from the dominant mating type (called mating type minus). Symbol, etymology, and usage Symbol A common symbol used to represent the male sex is the Mars symbol ♂, a circle with an arrow pointing northeast. The Unicode code-point is: U+2642 ♂ MALE SIGN (♂) The symbol is identical to the planetary symbol of Mars. It was first used to denote sex by Carl Linnaeus in 1751. The symbol is sometimes seen as a stylized representation of the shield and spear of the Roman god Mars. According to William T. Stearn, however, this derivation is "fanciful" and all the historical evidence favours "the conclusion of the French classical scholar Claude de Saumaise (Salmasius, 1588–1683)" that it is derived from θρ, the contraction of a Greek name for the planet Mars, which is Thouros. Etymology Borrowed from Old French masle, from Latin masculus ("masculine, male, worthy of a man"), diminutive of mās ("male person or animal, male"). Usage In humans, the word male can be used in the context of gender, such as for gender role or gender identity of a man or boy. For example, according to Merriam-Webster, "male" can refer to "having a gender identity that is the opposite of female". According to the Cambridge Dictionary, "male" can mean "belonging or relating to men". Male can also refer to a shape of connectors. Males across species Species that are divided into females and males are classified as gonochoric in animals, as dioecious in seed plants and as dioicous in cryptogams.: 82 Males can coexist with hermaphrodites, a sexual system called androdioecy. They can also coexist with females and hermaphrodites, a sexual system called trioecy. Sex determination The sex of a particular organism may be determined by a number of factors. These may be genetic or environmental, or may naturally change during the course of an organism's life. Although most species have only two sexes (either male or female), hermaphroditic animals, such as worms, have both male and female reproductive organs. Not all species share a common sex-determination system. In most animals, including humans, sex is determined genetically; however, species such as Cymothoa exigua change sex depending on the number of females present in the vicinity. Genetic determination Most mammals, including humans, are genetically determined as such by the XY sex-determination system where males have XY (as opposed to XX in females) sex chromosomes. It is also possible in a variety of species, including humans, to be XX male or have other karyotypes. During reproduction, a male can give either an X sperm or a Y sperm, while a female can only give an X egg. A Y sperm and an X egg produce a male, while an X sperm and an X egg produce a female. The part of the Y-chromosome which is responsible for maleness is the sex-determining region of the Y-chromosome, the SRY. The SRY activates Sox9, which forms feedforward loops with FGF9 and PGD2 in the gonads, allowing the levels of these genes to stay high enough in order to cause male development; for example, Fgf9 is responsible for development of the spermatic cords and the multiplication of Sertoli cells, both of which are crucial to male sexual development. The ZW sex-determination system, where males have ZZ (as opposed to ZW in females) sex chromosomes, may be found in birds and some insects (mostly butterflies and moths) and other organisms. Members of the insect order Hymenoptera, such as ants and bees, are often determined by haplodiploidy, where most males are haploid and females and some sterile males are diploid. However, fertile diploid males may still appear in some species, such as Cataglyphis cursor. Environmental determination In some species of reptiles, such as alligators, sex is determined by the temperature at which the egg is incubated. Other species, such as some snails, practice sex change: adults start out male, then become female. In.... Discover the David Male popular books. Find the top 100 most popular David Male books.
Best Seller David Male Books of 2024
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The Crimson Letter
Douglass Shand-TucciIn a book deeply impressive in its reach while also deeply embedded in its storied setting, bestselling historian Douglass ShandTucci explores the nature and expression of sexual i...
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Dear Lover
David DeidaAre You Ready to Open to Love’s Deepest Bliss?Every woman knows the fairy tale: find the right man, give him what he wants and needs, and he’ll love you forever. But when the myth ...
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Although Of Course You End Up Becoming Yourself
David LipskyNOW A MAJOR MOTION PICTURE, STARRING JASON SEGAL AND JESSE EISENBERG, DIRECTED BY JAMES PONSOLDTAn indelible portrait of David Foster Wallace, by turns funny and inspiring, based o...
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The Enlightened Sex Manual
David DeidaThe secret to enlightenment and great sex is revealed to be one and the same in this groundbreaking manual for adventurous lovers. David Deida was trained for decades in the art of...
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Irish Male At Home And Abroad
Joseph O'ConnorThe Irish Male at Home and Abroad is the hilarious sequel to Joe O'Connor's bestseller The Secret World of the Irish Male. From flirting lessons in downtown Manhattan to being offe...
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The Best American Poetry 2019
David Lehman & Major JacksonThe 2019 edition of The Best American Poetry“one of the mainstays of the poetry publication world” (Academy of American Poets)now guest edited by Major Jackson, awardwinning poet a...
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Small Gods
Terry PratchettIgnite your imagination with this immersive fantasy read!"Humorously entertaining. . . subtly thoughtprovoking. . . Pratchett's Discworld books are filled with humor and magic." Ch...
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Thirst
Kerry HudsonFrom the prizewinning author of Tony Hogan Bought Me An IceCream Float Before He Stole My MaWinner of the Prix Femina EtrangerLondon, in the frayed heat of summer. Alena is shoplif...
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The Girl in the Train
Agatha ChristiePreviously published in the print anthology The Golden Ball and Other Stories.George Rowland, a bored playboy, disowned for the seventh time by his wealthy uncle, is on the train t...
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Wyrd Sisters
Terry PratchettIn Terry Pratchett's Wyrd Sisters, Granny Weatherwax teams with two other witchesNanny Ogg and Margat Garlickas an unlikely alliance to save a prince and restore him to t...
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The Fifth Profession
David MorrellFrom the bestselling author of First Blood comes a spectacular thriller, in which a former Navy SEAL and a Japanese samurai master are bound together in a terrifying past that neve...
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Neverwhere
Neil Gaiman“Neil Gaiman is undoubtedly one of the modern masters of fantasy writing....For those who have not read Neverwhere, the new edition is the one to read, and is a fitting introd...
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Crash
J. G. BallardThe Definitive Cult, Postmodern Novela Shocking Blend of Violence, Transgression, and EroticismReissued with a New Introduction from Zadie SmithWhen J. G. Ballard, our narrator, sm...
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This Might Hurt a Bit
Doogie Horner“Full of wit and wisdom, and riotously funny to boot. A phenomenal debut!” Ransom Riggs, New York Times bestselling author of Miss Peregrine’s Home for Peculiar Children“As irrever...
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The Culture of Male Beauty in Britain
Paul R. DeslandesA heavily illustrated history of two centuries of male beauty in British culture.Spanning the decades from the rise of photography to the age of the selfie, this book traces the co...
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Vain Glorious
Jeremy Langmead & Dr David Jack"My life is a constant battle between vanity and laziness. This book has brokered the perfect peace deal!" Graham NortonShould I tint my eyebrows?How can I get a squarer jawline?W...
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Out of the Darkness
David A. JacintoOut of the Darkness is based on the true story of a nineteenthcentury child coal miner rising out of the ashes of poverty and tragedy to change the world. It’s the story of greed, ...
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Spider Trap
Barry MaitlandWhen human bones are discovered in Cockpit Lane, a poor area of inner south London, D.C.I. David Brock and D.S. Kathy Kolla of Scotland Yard are called in to investigate. The first...
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The Way of the Superior Man
David DeidaThe mark of a true classic is that it becomes more relevant with the passage of time Twenty years ago, David Deida wrote The Way of the Superior Man share lessons on “how a man can...
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Red-Blooded American Male
Robert TrachtenbergA collection of 100 inspired and surprising portraits of celebrities and everymen alike from the awardwinning photographer Robert Trachtenberg.Paul Rudd checking out...
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Erotic Massage for Couples
Sylvia PattersonThis comprehensive manual is an invitation to discover the secrets of erotic massage for couples.Erotic Massage for Couples teaches you, stepbystepwith the help of one hundred colo...
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El libro de hombres
Stephen MansfieldIngenioso, convincente y astuto, El libro de hombres de Mansfield se trata de la resurrección de tu ser innato, eterno, esencial y masculino.El mundo occidental está en una crisis ...
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Stay Up with Hugo Best
Erin SomersOne of Vogue’s Best Books of the Year “Incisive, funny, and tinged with melancholy, the timely novel follows two lost but clever souls desperate for connection.” Entertainment Wee...
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Born to be Mild
Rob Temple'If you're looking to ease yourself back into normality after lockdown, Born to be Mild should be top of your reading list' Mail OnlineA funny, lifeaffirming memoir from the creato...
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I Love Hearing Your Dreams
Matthew ZapruderFrom one of contemporary poetry’s most playful and original minds, an enchanting and harrowing journey through the landscape of dreams and twentyfirst century hopes and disillusion...
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The Light Fantastic
Terry Pratchett“Humorously entertaining. . . subtly thoughtprovoking. . . . Pratchett’s Discworld books are filled with humor and with magic, but they're rooted inof all thingsreal life and cold,...
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The Way Back
Jamie FeweryA moving, funny, sweeping and emotional family drama perfect for fans of David Nicholls, Beth O'Leary, Mike Gayle and Caroline Hulse. If you're reading this, my funeral must h...
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Committed
Chris MerrittSix days to stop a deadly attack. And no one else believes it's real.'Ingenious and turbocharged with suspense. A writer to surely put on your reading list.' David Baldacci 'Very w...
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WildLives
Ben LerwillFrom the illustrator of Herstory (a Publishers Weekly Best Book of 2018) comes a fascinating and touching book about fifty extraordinary animals that made human history!Discover th...
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From the Core
John WinelandA respected leader in men’s work shares a practical guide to redefine, heal, and reembrace masculinity in our world. Men today face a crisis of identity. While we can see how ...
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Future Man
Tim SamuelsA sharply intelligent, explosively honest, and laughoutloud funny look at the state of masculinity and how to be a man, for fans of Jon Ronson and Matt Haig.If ever there was an ur...
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Dandelion Wine
Ray BradburyRay Bradbury's moving recollection of a vanished golden era remains one of his most enchanting novels. Dandelion Wine stands out in the Bradbury literary canon as the author's most...
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Forced Out
Stephen FreyThree men. Three secrets. One chance at redemption. New York Times bestselling author Stephen Frey delivers a mesmerizing new thriller where life and death are played out against ...
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Seven Days in Utopia
David L. CookGolfers and nongolfers alike will be moved by this powerful story of transformation revealing the secrets to success in life beyond success in our game or work.Luke Chisolm is a ta...
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All My Enemies
Barry MaitlandIn one of the finest and most pivotal books in this critically acclaimed series, never before published in the U.S., D.S. Kathy Kolla reports to New Scotland Yard and to D.C.I. Dav...
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Peter Pan
James Matthew BarrieJ. M. Barrie’s classic children's story is reimagined in this delightful fullcolor deluxe edition filled with allnew illustrations and ten removable features specially designed by ...
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Waiting For Doggo
Mark MillsIt takes one scruffy dog to show a man how to fall in love...Noone ever called Dan a pushover. But then noone ever called him fasttrack either. He likes driving slowly, playing Sud...