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In heterogamous species, male is the sex of an organism, or of a part of an organism, which typically produces smaller, mobile gametes (spermatozoa) that are able to fertilise female gametes (ova). A male individual cannot reproduce sexually without access to the gametes of a female.
There is no single genetic sex-determination system which controls sex differences in different species. The existence of two sexes seems to have evolved multiple times independently in different evolutionary lineages. Other than the defining difference in the type of gamete produced, differences between males and females in one lineage cannot always be predicted by differences in another.
The concept of male/female dimorphism between individuals or reproductive organs 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.
Secondary sex characteristics
More on [ Male ]
Pensieri a briglia sciolta - Per la serie âsto male e anche tantoâ il primo pensiero del giorno oggi è... http://t.co/ClsXfm1G
ITFedekinecrzy (Federico Catocci) Sat, 04 Feb 2012 13:08:06 -0000
Pensieri a briglia sciolta - Per la serie “sto male e anche tanto” il primo pensiero del giorno oggi è... http://t.co/ClsXfm1G
#politics Moonbase Callista to have co-ed dorms, steam rooms and saunas. Open society rules include alpha male pro-creation privileges.
hamackey (hamackey) Sat, 04 Feb 2012 13:08:02 -0000
#politics Moonbase Callista to have co-ed dorms, steam rooms and saunas. Open society rules include alpha male pro-creation privileges.
@AyYoItsO Male prostitution pays well.
Rory_Bonklife (Rory Snyder) Sat, 04 Feb 2012 13:08:00 -0000
@AyYoItsO Male prostitution pays well.
Mildly bored...6 likes to answer this? ~Roonil Male/Female: Hair colour: Favourite ... Colour: Hairstyle:... http://t.co/1lN2xRT9
TheAwkward7 (Potter7) Sat, 04 Feb 2012 13:07:59 -0000
Mildly bored...6 likes to answer this? ~Roonil Male/Female: Hair colour: Favourite ... Colour: Hairstyle:... http://t.co/1lN2xRT9
#iheard ya boyfriend is tha cover model for male spanx...congrads
RepoLakey (Repo Lakey) Sat, 04 Feb 2012 13:07:57 -0000
#iheard ya boyfriend is tha cover model for male spanx...congrads
Kakean jamu ki sam..hehe RT @Bachtiar_Oswald: kurang jamu bocah iki RT @okkympar @DikaCib @Ais_Backpacker Kok male lemah kyok adikmu ngono
DikaCib (Noer Dika) Sat, 04 Feb 2012 13:07:55 -0000
Kakean jamu ki sam..hehe RT @Bachtiar_Oswald: kurang jamu bocah iki RT @okkympar @DikaCib @Ais_Backpacker Kok male lemah kyok adikmu ngono
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