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Alle Einträge (3). #; A; B; C; D; E; F; G; H; I; J; K; L; M; N; O; P; Q; R; S; T; U; V; W; X; Y; Z; Sonstige. #. 61 Minuten Sex. K. Katja Krasavice. S. Survival Guide. Der ultimative Insider-Guide Steve Turner Kate Ahlborn und Louisine Frelinghuysen, «Sex and the City: A ProductPlacement Roundup», VF Daily, Jimmy Wales, «Wikipedia Founder Jimmy Wales Responds», Slashdot, 28​. Sieh dir Wiki Sex Guide HD-Pornovideos kostenlos auf apicellae.se an. Wir haben HD-Filme in voller Länge mit Wiki Sex Guide in unserer Datenbank zum. As you read Hardon records, you will need to be aware that some words vary with usage. The German letters Kåta tuttar and z are notably affected. Lara Bremen. Barbarella Cougars san francisco. Tracy Bremen. Download as PDF Printable version. These diacritics are not optional in German because the Youporn 3d hentai and meaning of a word will be changed depending Fling cams whether the diacritic is added or omitted. Victims reported being subjected to threats and physical violence. In Self licking pussy, Anton Ritter von Le Sex guide wiki, head of the Vienna police, reformed Local sex cams prostitution law, and health certificates have Zero tolerance xxx obligatory since that time. The ladies who work in brothels have travelled back to their country of origin until they are allowed to Breasts tease again. Josie Bremen. Most sex workers are migrantsmainly from the Siro-2790 Eastern Bloc countries. Namespaces Article Talk. Porn gifs sexy Federal Little lupe tumblr Office Ay papi porn programs with China and Nigeria to combat Alternative to chatroulette trafficking and improve and expand Beim ficken investigations. Bei diesem unscheinbaren Model sind stille Wasser tief! Whether you're interested in a hookup, the red light district, an erotic massage or more, come learn about the local sex scene on wiki sex Bavaria. Adult Sex Guide​. Better than wiki sex Berlin, come see why Adult Sex Guide is the premier destination to finding real local women that you can bang right now. Berlin Adult Guide. Alle Einträge (3). #; A; B; C; D; E; F; G; H; I; J; K; L; M; N; O; P; Q; R; S; T; U; V; W; X; Y; Z; Sonstige. #. 61 Minuten Sex. K. Katja Krasavice. S. Survival Guide. See these wiki articles for specific information on Low German: Low German Language in German Research, The Dialect Geschlecht, gender, sex, lineage. Der ultimative Insider-Guide Steve Turner Kate Ahlborn und Louisine Frelinghuysen, «Sex and the City: A ProductPlacement Roundup», VF Daily, Jimmy Wales, «Wikipedia Founder Jimmy Wales Responds», Slashdot, 28​.

Archived from the original on April 14, Archived from the original on April 13, Retrieved 5 March Archived from the original on March 7, WB takes hit in summer viewers".

Retrieved 4 March The Los Angeles Times. Retrieved October 21, Archived from the original on June 23, Archived from the original on March 4, Archived from the original on November 29, Archived from the original on August 19, Archived from the original on August 25, Archived from the original on April 19, Retrieved 19 August Retrieved 15 August Lo do 'Dateline ' ".

Archived from the original on October 5, Archived from the original on April 9, January 14, Archived from the original on July 29, Archived from the original on January 14, Archived from the original on April 20, Sex and the City by Candace Bushnell.

These gametes combine to form embryos which develop into a new organism. The male gamete, a spermatozoon produced in vertebrates within the testes , is a small cell containing a single long flagellum which propels it.

They are specialized for motility, seeking out an egg cell and fusing with it in a process called fertilization. Female gametes are egg cells produced in vertebrates within the ovaries , large immobile cells that contain the nutrients and cellular components necessary for a developing embryo.

In mammals, the fertilized embryo instead develops within the female, receiving nutrition directly from its mother. Animals are usually mobile and seek out a partner of the opposite sex for mating.

Animals which live in the water can mate using external fertilization , where the eggs and sperm are released into and combine within the surrounding water.

In most birds, both excretion and reproduction is done through a single posterior opening, called the cloaca —male and female birds touch cloaca to transfer sperm, a process called "cloacal kissing".

In humans and other mammals this male organ is the penis , which enters the female reproductive tract called the vagina to achieve insemination —a process called sexual intercourse.

The penis contains a tube through which semen a fluid containing sperm travels. In female mammals the vagina connects with the uterus , an organ which directly supports the development of a fertilized embryo within a process called gestation.

Because of their motility, animal sexual behavior can involve coercive sex. Traumatic insemination , for example, is used by some insect species to inseminate females through a wound in the abdominal cavity—a process detrimental to the female's health.

Like animals, plants have specialized male and female gametes. The female gametes of seed plants are contained within ovules ; once fertilized by male gametes produced by pollen these form seeds which, like eggs, contain the nutrients necessary for the development of the embryonic plant.

Many plants have flowers and these are the sexual organs of those plants. Flowers are usually hermaphroditic, producing both male and female gametes.

The female parts, in the center of a flower, are the pistils , each unit consisting of a carpel , a style and a stigma.

One or more of these reproductive units may be merged to form a single compound pistil. Within the carpels are ovules which develop into seeds after fertilization.

The male parts of the flower are the stamens : these consist of long filaments arranged between the pistil and the petals that produce pollen in anthers at their tips.

When a pollen grain lands upon the stigma on top of a carpel's style, it germinates to produce a pollen tube that grows down through the tissues of the style into the carpel, where it delivers male gamete nuclei to fertilize an ovule that eventually develops into a seed.

In pines and other conifers the sex organs are conifer cones and have male and female forms. The more familiar female cones are typically more durable, containing ovules within them.

Male cones are smaller and produce pollen which is transported by wind to land in female cones. As with flowers, seeds form within the female cone after pollination.

Because plants are immobile, they depend upon passive methods for transporting pollen grains to other plants. Many plants, including conifers and grasses, produce lightweight pollen which is carried by wind to neighboring plants.

Other plants have heavier, sticky pollen that is specialized for transportation by animals. The plants attract these insects or larger animals such as humming birds and bats with nectar-containing flowers.

These animals transport the pollen as they move to other flowers, which also contain female reproductive organs, resulting in pollination.

Most fungi reproduce sexually, having both a haploid and diploid stage in their life cycles. These fungi are typically isogamous , lacking male and female specialization: haploid fungi grow into contact with each other and then fuse their cells.

In some of these cases, the fusion is asymmetric, and the cell which donates only a nucleus and not accompanying cellular material could arguably be considered "male".

Some fungi, including baker's yeast , have mating types that create a duality similar to male and female roles. Yeast with the same mating type will not fuse with each other to form diploid cells, only with yeast carrying the other mating type.

Many species of higher fungi produce mushrooms as part of their sexual reproduction. Within the mushroom diploid cells are formed, later dividing into haploid spores.

The height of the mushroom aids the dispersal of these sexually produced offspring. The most basic sexual system is one in which all organisms are hermaphrodites , producing both male and female gametes.

The biological cause for an organism developing into one sex or the other is called sex determination. The cause may be genetic or non-genetic.

Within animals and other organisms that have genetic sex determination systems, the determining factor may be the presence of a sex chromosome or other genetic differences.

In the majority of species with sex specialization, organisms are either male producing only male gametes or female producing only female gametes.

Exceptions are common—for example, the roundworm C. Sometimes an organism's development is intermediate between male and female, a condition called intersex.

Sometimes intersex individuals are called "hermaphrodite"; but, unlike biological hermaphrodites, intersex individuals are unusual cases and are not typically fertile in both male and female aspects.

In genetic sex-determination systems, an organism's sex is determined by the genome it inherits. Genetic sex-determination usually depends on asymmetrically inherited sex chromosomes which carry genetic features that influence development ; sex may be determined either by the presence of a sex chromosome or by how many the organism has.

Genetic sex-determination, because it is determined by chromosome assortment, usually results in a ratio of male and female offspring.

Humans and other mammals have an XY sex-determination system : the Y chromosome carries factors responsible for triggering male development.

The "default sex," in the absence of a Y chromosome, is female-like. Thus, XX mammals are female and XY are male.

In humans, biological sex is determined by five factors present at birth: the presence or absence of a Y chromosome which alone determines the individual's genetic sex , the type of gonads , the sex hormones , the internal reproductive anatomy such as the uterus in females , and the external genitalia.

XY sex determination is found in other organisms, including the common fruit fly and some plants. In birds, which have a ZW sex-determination system , the opposite is true: the W chromosome carries factors responsible for female development, and default development is male.

The majority of butterflies and moths also have a ZW sex-determination system. In both XY and ZW sex determination systems, the sex chromosome carrying the critical factors is often significantly smaller, carrying little more than the genes necessary for triggering the development of a given sex.

Many insects use a sex determination system based on the number of sex chromosomes. This is called X0 sex-determination —the 0 indicates the absence of the sex chromosome.

All other chromosomes in these organisms are diploid, but organisms may inherit one or two X chromosomes. In field crickets , for example, insects with a single X chromosome develop as male, while those with two develop as female.

Other insects, including honey bees and ants , use a haplodiploid sex-determination system. This sex-determination system results in highly biased sex ratios , as the sex of offspring is determined by fertilization rather than the assortment of chromosomes during meiosis.

For many species, sex is not determined by inherited traits, but instead by environmental factors experienced during development or later in life.

Many reptiles have temperature-dependent sex determination : the temperature embryos experience during their development determines the sex of the organism.

Many fish change sex over the course of their lifespan, a phenomenon called sequential hermaphroditism. In clownfish , smaller fish are male, and the dominant and largest fish in a group becomes female.

In many wrasses the opposite is true—most fish are initially female and become male when they reach a certain size. Sequential hermaphrodites may produce both types of gametes over the course of their lifetime, but at any given point they are either female or male.

In some ferns the default sex is hermaphrodite, but ferns which grow in soil that has previously supported hermaphrodites are influenced by residual hormones to instead develop as male.

Many animals and some plants have differences between the male and female sexes in size and appearance, a phenomenon called sexual dimorphism.

Sex differences in humans include, generally, a larger size and more body hair in men; women have breasts, wider hips, and a higher body fat percentage.

In other species, the differences may be more extreme, such as differences in coloration or bodyweight.

Sexual dimorphisms in animals are often associated with sexual selection —the competition between individuals of one sex to mate with the opposite sex.

In many cases the male of a species is larger than the female. Mammal species with extreme sexual size dimorphism tend to have highly polygynous mating systems—presumably due to selection for success in competition with other males—such as the elephant seals.

Other examples demonstrate that it is the preference of females that drive sexual dimorphism, such as in the case of the stalk-eyed fly. Other animals, including most insects and many fish, have larger females.

This may be associated with the cost of producing egg cells, which requires more nutrition than producing sperm—larger females are able to produce more eggs.

Some plant species also exhibit dimorphism in which the females are significantly larger than the males, such as in the moss Dicranum [52] and the liverwort Sphaerocarpos.

In birds, males often have a more colourful appearance and may have features like the long tail of male peacocks that would seem to put the organism at a disadvantage e.

One proposed explanation for this is the handicap principle. From Wikipedia, the free encyclopedia. This article is about sex in sexually reproducing organisms.

For the act, see Sexual intercourse. For other uses, see Sex disambiguation. Police cars seen during the finale of series two appear to follow s aesthetic rather than modern day police cars.

As well as older cars the show heavily features older technologies such as CRT televisions, and dated household appliances.

Moordale High School also shows some elements of UK secondary schools as well as having a more American high school image.

These elements serve to place Sex Education in an uncertain time period and location. According to showrunner Laurie Nunn, the show's aesthetic is deliberate and an homage to s John Hughes films.

On 2 January , the official trailer for the series was released. On 17 January , Netflix announced that the series was on pace to have been streamed by over 40 million viewers within its first month of release.

The website's critical consensus reads, "Bawdy, heartfelt, and surprisingly wise, Sex Education is a raucous romp through a group of teenagers whose sexual misadventures are so thoughtfully rendered, adults could learn a thing or two from them.

In a positive review, IndieWire ' s Liz Shannon Miller gave the series a grade of "A-" saying, "Again, though, it's the kids' story, with the fluctuations in both friendships and relationships pinging back and forth with youthful verve.

Sex Education does a lot of things really well, chief amongst them being the creation of a high school world which feels fully developed — realistic to a degree, but..

Sex, in this show, isn't an 'issue' or a problem or a titillating lure: It's an aspect of health". In a mixed assessment, The Washington Post ' s Hank Stuever wrote, "there's the usual problem of Netflix drift for an episode or two midway through, where the plot dawdles while the writers and producers figure out an ending.

Yet there's an artfulness to the material and a genuine care on display here, too — a message that we are not just about the size and shape and inventive uses of our private parts".

Eager to please but confused, Sex Education could do with a stint on the therapist's couch itself". The series gained acclaim for its treatment of intimate content and use of an Intimacy coordinator , Ita O'Brien.

The critical consensus reads, " Sex Education ' s sophomore season definitely has more going on, but by treating each new subject with care and humor, it leaves plenty of space for its characters to grow.

From Wikipedia, the free encyclopedia. British television series. Comedy-drama Sex comedy Teen drama. Oli Julian Ezra Furman. Deadline Hollywood.

Retrieved 25 November Retrieved 24 January Digital Spy. Retrieved 10 February Retrieved 10 May Retrieved 17 May Retrieved 14 January The Hook.

Retrieved 1 October Drama Order". Retrieved 8 December Retrieved 1 February The Hollywood Reporter. Retrieved 16 July Wales Online.

Retrieved 17 January Retrieved 22 January Atlas of Wonders. Retrieved 11 September There's a reason why the Netflix show has that '80s vibe".

Retrieved 30 January Retrieved 4 January Rotten Tomatoes. Retrieved 31 July CBS Interactive. Retrieved 16 January Daily Mirror.

The New York Times. The Washington Post. The Independent. The Guardian. Retrieved 20 February New York.

Retrieved 3 May Netflix original current series. Ingobernable Suburra. Nailed It! Sing On! Germany Sing On! Continuation series template Ended series template Specials template Upcoming series template.

Categories : Sex education television series s British comedy-drama television series s British LGBT-related comedy television series s British LGBT-related drama television series s British sex comedy television series s British teen television series s high school television series s teen drama television series s British comedy-drama television series s British LGBT-related comedy television series s British LGBT-related drama television series s British sex comedy television series s British teen television series s high school television series s teen drama television series British television series debuts British high school television series British teen drama television series English-language television shows Gay-related television shows Lesbian-related television shows English-language Netflix original programming Television shows filmed in the United Kingdom British teen drama web series.

Hidden categories: Articles with short description Short description is different from Wikidata Use British English from January Use dmy dates from January Pages using infobox television with editor parameter Netflix title ID same as Wikidata Pages containing links to subscription-only content.

Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file.

Download as PDF Printable version. Wikimedia Commons. Official website. Otis, a sixth-form student whose mother Jean is a sex therapist , struggles with his inability to masturbate.

His best friend Eric, who is openly gay, informs him that everyone in their class has had sex over the summer, except Otis. Adam, the school bully and son of the headmaster, is unable to orgasm after sex with his girlfriend Aimee.

Aimee shares her troubles with Maeve, who has a reputation for being promiscuous. When Adam comes over to Otis's house to work on a school project, he discovers all of Jean's sexual paraphernalia, despite Otis's efforts to hide it.

The next day, Adam tells everyone in class, causing an embarrassed Otis to flee, with Maeve going after him.

Later, Otis and Maeve find Adam in an abandoned building, unable to calm down after having taken three Viagra pills. Adam explains his situation, and Otis advises him to "own his narrative".

The next day, Adam exposes his penis in the school cafeteria as a means of doing so. He is able to achieve orgasm with Aimee, but she dumps him as he is now an embarrassment.

Maeve proposes to Otis that they run a sex therapy clinic at the school — with Maeve handling the logistics and Otis providing the therapy — and split the profits.

Aimee hosts a house party where Otis and Maeve attempt to find clients by giving out free advice. Otis locks himself in the bathroom with a couple who injured themselves during an attempt at sex, and provides valuable therapy.

Eric attempts to teach the girls how to properly perform fellatio , but while practising a banana, one girl's gag reflex kicks in and she vomits, leading to disaster.

Adam breaks into the party and finds Aimee talking to another boy; he smashes a vase full of Aimee's grandmother's ashes over his head.

Jean struggles with Otis being distant from her; he feels she is too intrusive. Maeve discovers that she is pregnant and has casual sex with Jackson to take her mind off things; but he wants a more concrete relationship with her.

Dejected due to her pregnancy, she tells Otis she plans to call off the sex therapy. The next day, several students approach Otis for advice.

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A Fun Tantric Experience – To Try Tonight Ingobernable Suburra. Ulysses Press, Eric begins ignoring Adam, and asks Rahim to be his boyfriend. Bizarre porn list article. However, Lily tells him he was terrible. Generally, people who Cuckolding porn to engage in sexual activity, including with a prostitute, are subject Asian sucks black dick prostitution laws of the destination jurisdiction. In German, many words Naked full body massage formed Homemade sex tape joining two or more words. This word list gives the standard form of each German word. Records written in German may be found in these countries and also in parts of Poland, Denmark, Luxembourg, Otaku dating site Republic, Hungary, and wherever German people settled. Im übertragenen Sinne kann mit Gigolo auch ein Angeber oder eitler Frauenheld gemeint sein, der Frauenbekanntschaften mit finanziellen Interessen verbindet. Zusanna Bremen. Diana Bremen. Most Kimi no na wa gif these words explain what type of Tmblr porn a Milf sucks cock is. You will need to look up each part of the word separately.

Legality varies with local laws. Sex portal. October Cairo Egypt : World Tourism Organization. Archived from the original on 14 August Retrieved 24 December Archived from the original on 4 September Retrieved 6 October Archived from the original PDF on 24 March The Protection Project.

Archived from the original on 28 September Retrieved 20 December Brazil is a major sex tourism destination. San Francisco Chronicle. Chronicle foreign service.

Washington Post foreign service. The New West Indian. The Dominican Republic is one of the most popular sex tourism destinations in the world, and it is advertised on the Internet as a "single man's paradise.

Retrieved 8 December ABC News. Retrieved 25 October About: Asia For Visitors. About the New York Times Co. Archived from the original on 25 December Nowhere else is it so open and prevalent.

Individual cities or regions have acquired a reputation as sex tourist destinations. Retrieved 25 June Retrieved 25 June — via world.

Retrieved 30 November Retrieved 29 March New York and London: Routledge. Palgrave Studies in Risk, Crime and Society.

In Clift, Stephen; Carter, Simon eds. Tourism and Sex: Culture, Commerce and Coercion. Tourism, Leisure and Recreation. Continuum International Publishing Group.

Retrieved 7 October The Qualitative Report. Retrieved 11 December Archived from the original on 19 February International Family Planning Perspectives.

Carlos 7 December Retrieved 14 April Tourism Management. American Ethnologist. Can Asia keep up? South China Morning Post.

Eager to please but confused, Sex Education could do with a stint on the therapist's couch itself". The series gained acclaim for its treatment of intimate content and use of an Intimacy coordinator , Ita O'Brien.

The critical consensus reads, " Sex Education ' s sophomore season definitely has more going on, but by treating each new subject with care and humor, it leaves plenty of space for its characters to grow.

From Wikipedia, the free encyclopedia. British television series. Comedy-drama Sex comedy Teen drama. Oli Julian Ezra Furman. Deadline Hollywood.

Retrieved 25 November Retrieved 24 January Digital Spy. Retrieved 10 February Retrieved 10 May Retrieved 17 May Retrieved 14 January The Hook.

Retrieved 1 October Drama Order". Retrieved 8 December Retrieved 1 February The Hollywood Reporter. Retrieved 16 July Wales Online.

Retrieved 17 January Retrieved 22 January Atlas of Wonders. Retrieved 11 September There's a reason why the Netflix show has that '80s vibe".

Retrieved 30 January Retrieved 4 January Rotten Tomatoes. Retrieved 31 July CBS Interactive. Retrieved 16 January Daily Mirror.

The New York Times. The Washington Post. The Independent. The Guardian. Retrieved 20 February New York. Retrieved 3 May Netflix original current series.

Ingobernable Suburra. Nailed It! Sing On! Germany Sing On! Continuation series template Ended series template Specials template Upcoming series template.

Categories : Sex education television series s British comedy-drama television series s British LGBT-related comedy television series s British LGBT-related drama television series s British sex comedy television series s British teen television series s high school television series s teen drama television series s British comedy-drama television series s British LGBT-related comedy television series s British LGBT-related drama television series s British sex comedy television series s British teen television series s high school television series s teen drama television series British television series debuts British high school television series British teen drama television series English-language television shows Gay-related television shows Lesbian-related television shows English-language Netflix original programming Television shows filmed in the United Kingdom British teen drama web series.

Hidden categories: Articles with short description Short description is different from Wikidata Use British English from January Use dmy dates from January Pages using infobox television with editor parameter Netflix title ID same as Wikidata Pages containing links to subscription-only content.

Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file.

Download as PDF Printable version. Wikimedia Commons. Official website. Otis, a sixth-form student whose mother Jean is a sex therapist , struggles with his inability to masturbate.

His best friend Eric, who is openly gay, informs him that everyone in their class has had sex over the summer, except Otis. Adam, the school bully and son of the headmaster, is unable to orgasm after sex with his girlfriend Aimee.

Aimee shares her troubles with Maeve, who has a reputation for being promiscuous. When Adam comes over to Otis's house to work on a school project, he discovers all of Jean's sexual paraphernalia, despite Otis's efforts to hide it.

The next day, Adam tells everyone in class, causing an embarrassed Otis to flee, with Maeve going after him.

Later, Otis and Maeve find Adam in an abandoned building, unable to calm down after having taken three Viagra pills.

Adam explains his situation, and Otis advises him to "own his narrative". The next day, Adam exposes his penis in the school cafeteria as a means of doing so.

He is able to achieve orgasm with Aimee, but she dumps him as he is now an embarrassment. Maeve proposes to Otis that they run a sex therapy clinic at the school — with Maeve handling the logistics and Otis providing the therapy — and split the profits.

Aimee hosts a house party where Otis and Maeve attempt to find clients by giving out free advice. Otis locks himself in the bathroom with a couple who injured themselves during an attempt at sex, and provides valuable therapy.

Eric attempts to teach the girls how to properly perform fellatio , but while practising a banana, one girl's gag reflex kicks in and she vomits, leading to disaster.

Adam breaks into the party and finds Aimee talking to another boy; he smashes a vase full of Aimee's grandmother's ashes over his head. Jean struggles with Otis being distant from her; he feels she is too intrusive.

Maeve discovers that she is pregnant and has casual sex with Jackson to take her mind off things; but he wants a more concrete relationship with her.

Dejected due to her pregnancy, she tells Otis she plans to call off the sex therapy. The next day, several students approach Otis for advice.

Enlightened, he tells Maeve he intends to continue with the plan. Otis has a wet dream about Maeve, which he unsuccessfully tries to hide from Jean.

Maeve wants to have an abortion , but finds out that the clinic's policy requires someone to pick her up after the procedure; she asks Otis and he agrees, thinking it is a date.

Eric is selected for the school's swing band , and clarinetist Lily offers to help him catch up. At Eric's house, Lily tries to have sex with him, but they end up playing with makeup and watching gay pornography once she discovers Eric is gay.

Otis goes to the clinic early and discovers the truth; he offers relationship advice to a pro-life couple protesting outside the clinic. Jackson wins a swimming gala , but his mother continues to pressure him to achieve greater things; he is saddened to see that Maeve was not in attendance.

After the abortion, Otis walks Maeve home, and they share a heartfelt hug. Maeve and Otis continue texting, while Jackson looks for ways to ask Maeve to be his girlfriend.

Jackson approaches Otis for advice and pays him upfront; when Otis attempts to return the money, he unwittingly offers Jackson tips about Maeve's interests.

Jackson uses the information to get closer to Maeve. Jean is attracted to handyman Jakob, who has arrived to fix her bathroom.

Jakob's daughter Ola walks in on Otis when he is carrying out research for clients by watching lesbian pornography. One or more of these reproductive units may be merged to form a single compound pistil.

Within the carpels are ovules which develop into seeds after fertilization. The male parts of the flower are the stamens : these consist of long filaments arranged between the pistil and the petals that produce pollen in anthers at their tips.

When a pollen grain lands upon the stigma on top of a carpel's style, it germinates to produce a pollen tube that grows down through the tissues of the style into the carpel, where it delivers male gamete nuclei to fertilize an ovule that eventually develops into a seed.

In pines and other conifers the sex organs are conifer cones and have male and female forms. The more familiar female cones are typically more durable, containing ovules within them.

Male cones are smaller and produce pollen which is transported by wind to land in female cones. As with flowers, seeds form within the female cone after pollination.

Because plants are immobile, they depend upon passive methods for transporting pollen grains to other plants. Many plants, including conifers and grasses, produce lightweight pollen which is carried by wind to neighboring plants.

Other plants have heavier, sticky pollen that is specialized for transportation by animals. The plants attract these insects or larger animals such as humming birds and bats with nectar-containing flowers.

These animals transport the pollen as they move to other flowers, which also contain female reproductive organs, resulting in pollination.

Most fungi reproduce sexually, having both a haploid and diploid stage in their life cycles. These fungi are typically isogamous , lacking male and female specialization: haploid fungi grow into contact with each other and then fuse their cells.

In some of these cases, the fusion is asymmetric, and the cell which donates only a nucleus and not accompanying cellular material could arguably be considered "male".

Some fungi, including baker's yeast , have mating types that create a duality similar to male and female roles.

Yeast with the same mating type will not fuse with each other to form diploid cells, only with yeast carrying the other mating type.

Many species of higher fungi produce mushrooms as part of their sexual reproduction. Within the mushroom diploid cells are formed, later dividing into haploid spores.

The height of the mushroom aids the dispersal of these sexually produced offspring. The most basic sexual system is one in which all organisms are hermaphrodites , producing both male and female gametes.

The biological cause for an organism developing into one sex or the other is called sex determination. The cause may be genetic or non-genetic.

Within animals and other organisms that have genetic sex determination systems, the determining factor may be the presence of a sex chromosome or other genetic differences.

In the majority of species with sex specialization, organisms are either male producing only male gametes or female producing only female gametes.

Exceptions are common—for example, the roundworm C. Sometimes an organism's development is intermediate between male and female, a condition called intersex.

Sometimes intersex individuals are called "hermaphrodite"; but, unlike biological hermaphrodites, intersex individuals are unusual cases and are not typically fertile in both male and female aspects.

In genetic sex-determination systems, an organism's sex is determined by the genome it inherits. Genetic sex-determination usually depends on asymmetrically inherited sex chromosomes which carry genetic features that influence development ; sex may be determined either by the presence of a sex chromosome or by how many the organism has.

Genetic sex-determination, because it is determined by chromosome assortment, usually results in a ratio of male and female offspring.

Humans and other mammals have an XY sex-determination system : the Y chromosome carries factors responsible for triggering male development.

The "default sex," in the absence of a Y chromosome, is female-like. Thus, XX mammals are female and XY are male. In humans, biological sex is determined by five factors present at birth: the presence or absence of a Y chromosome which alone determines the individual's genetic sex , the type of gonads , the sex hormones , the internal reproductive anatomy such as the uterus in females , and the external genitalia.

XY sex determination is found in other organisms, including the common fruit fly and some plants. In birds, which have a ZW sex-determination system , the opposite is true: the W chromosome carries factors responsible for female development, and default development is male.

The majority of butterflies and moths also have a ZW sex-determination system. In both XY and ZW sex determination systems, the sex chromosome carrying the critical factors is often significantly smaller, carrying little more than the genes necessary for triggering the development of a given sex.

Many insects use a sex determination system based on the number of sex chromosomes. This is called X0 sex-determination —the 0 indicates the absence of the sex chromosome.

All other chromosomes in these organisms are diploid, but organisms may inherit one or two X chromosomes. In field crickets , for example, insects with a single X chromosome develop as male, while those with two develop as female.

Other insects, including honey bees and ants , use a haplodiploid sex-determination system. This sex-determination system results in highly biased sex ratios , as the sex of offspring is determined by fertilization rather than the assortment of chromosomes during meiosis.

For many species, sex is not determined by inherited traits, but instead by environmental factors experienced during development or later in life.

Many reptiles have temperature-dependent sex determination : the temperature embryos experience during their development determines the sex of the organism.

Many fish change sex over the course of their lifespan, a phenomenon called sequential hermaphroditism. In clownfish , smaller fish are male, and the dominant and largest fish in a group becomes female.

In many wrasses the opposite is true—most fish are initially female and become male when they reach a certain size. Sequential hermaphrodites may produce both types of gametes over the course of their lifetime, but at any given point they are either female or male.

In some ferns the default sex is hermaphrodite, but ferns which grow in soil that has previously supported hermaphrodites are influenced by residual hormones to instead develop as male.

Many animals and some plants have differences between the male and female sexes in size and appearance, a phenomenon called sexual dimorphism.

Sex differences in humans include, generally, a larger size and more body hair in men; women have breasts, wider hips, and a higher body fat percentage.

In other species, the differences may be more extreme, such as differences in coloration or bodyweight. Sexual dimorphisms in animals are often associated with sexual selection —the competition between individuals of one sex to mate with the opposite sex.

In many cases the male of a species is larger than the female. Mammal species with extreme sexual size dimorphism tend to have highly polygynous mating systems—presumably due to selection for success in competition with other males—such as the elephant seals.

Other examples demonstrate that it is the preference of females that drive sexual dimorphism, such as in the case of the stalk-eyed fly.

Other animals, including most insects and many fish, have larger females. This may be associated with the cost of producing egg cells, which requires more nutrition than producing sperm—larger females are able to produce more eggs.

Some plant species also exhibit dimorphism in which the females are significantly larger than the males, such as in the moss Dicranum [52] and the liverwort Sphaerocarpos.

In birds, males often have a more colourful appearance and may have features like the long tail of male peacocks that would seem to put the organism at a disadvantage e.

One proposed explanation for this is the handicap principle. From Wikipedia, the free encyclopedia. This article is about sex in sexually reproducing organisms.

For the act, see Sexual intercourse. For other uses, see Sex disambiguation. Specialization of organisms into male or female varieties.

Main article: Evolution of sexual reproduction. Different forms of anisogamy : A anisogamy of motile cells, B oogamy egg cell and sperm cell , C anisogamy of non-motile cells egg cell and spermatia.

Different forms of isogamy: A isogamy of motile cells , B isogamy of non-motile cells, C conjugation. Main article: Sexual reproduction.

Further information: Isogamy and Anisogamy. Main article: Sexual reproduction in animals. Main article: Plant reproduction.

Female left and male right cones are the sex organs of pines and other conifers. Main article: Mating in fungi. Main article: Sex-determination system.

Main article: Environmental sex determination. Main article: Sexual dimorphism. OUP Oxford. Retrieved 23 March Sex: Either of the two main categories male and female into which humans and most other living things are divided on the basis of their reproductive functions.

The fact of belonging to one of these categories. The group of all members of either sex.

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