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These slipper limpets show the evolutionarily advanced feature of internal fertilization, and the male on top extends his reproductive organ down the pile of females below him to fertilize their eggs.

For some fish, the number of males in the population determines the sex of the fish.

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source "to divide or cut" (see section (n.)).

Meaning "quality of being male or female" first recorded 1520s.

In a species of slipper limpet (Crepidula fornicata), a kind of mollusk, all individuals begin life as females.

Clinging to rocks and to each other, they form piles. If another limpet attaches itself on top of the male limpet, the newcomer becomes male, and the male limpet beneath it reverts to being female.

If there are not enough males, some females become males.

For the raw sex appeal of the burlesque "shows" there is no defense, either.Meer informatie, zoals over hoe je je instellingen kunt aanpassen, vind je hier: cookiebeleid.Հաճախ կարծում են, որ հղիություն և սեռական կյանք երևույթները իրարամերժ են, և հղի կանայք պետք է զերծ մնան սեռական կյանքից.If the eggs of the American alligator (Alligator mississippiensis) are incubated at above 34 degrees Celsius (93° F), all of the offspring become males.If they are incubated below 30 degrees Celsius (86° F), they become females.

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