Examples include dioecious species where only one sex is present . 例如在雌雄異株種類中僅僅存在單性。
Endodeme is a deme composed of predominantly closely inbreeding but dioecious individuals . 同系同群種是由近親繁育占優(yōu)勢,但雌雄異株的個(gè)體組成的同群種。
This promotes genetic varation in the population especially in plants that are dioecious and moneclous 可以在種群中產(chǎn)生遺傳變異,特別是在一些雌雄異體或雌雄同體的植物中。
Examples include the scale leaves of parasitic flowering plants or the reduced stamens in females of dioecious species 例如:寄生有花植物的鱗葉;雌雄異株種類的雌株的退化雄蕊。
It is a dioecious plant . the female tree is different from the male in many aspects , such as karyotype analysis , pattern of peroxidase isozymes and shape of flower 銀杏又是嚴(yán)格的雌雄異株,還沒有發(fā)現(xiàn)雌雄同株現(xiàn)象,其雌雄株在染色體核型,過氧化物同工酶譜等都有較大差異。