Osisi nile n’okike nwere ihe di iche. Dabere na nkewa nke nwoke na nwanyị, ụdị osisi dị iche iche na-ekewa n'ime ndị a:
- ihe anwansi;
- dioecious;
- ọtụtụ.
Osisi Dioecious bụ ndị nwere ifuru nwanyị na ụfọdụ ndị nwoke na ụmụ nwoke na ndị ọzọ. Ha pollination emee n'ụzọ obe. Ya mere, a na-eke mkpụrụ osisi nke dioecious osisi ma ọ bụrụ na a na-enyefe pollen nke ndị mmadụ site na nwoke okooko osisi na osisi nwere ifuru nwanyị. Usoro a agaraghị ekwe omume ma ọ bụrụ na enweghị a ,ụ, nke na-adabere na ya ọzọ. Ihe ọghọm nke ngwaọrụ dị otú ahụ dị ka dioeciousness bụ na mkpụrụ anaghị apụta na 50% nke osisi nke otu ụdị. Na okike, enweghi ihe karịrị 6% nke ụdị ụdị ahụ. Ndị a gụnyere osisi ndị a:
Willow
Sọrel
Mistletoe
Laurel
Nettle
Poplar
Mgbapu
Aspen
Esemokwu dị n'etiti nwoke na nwanyị
Mata ọdịiche dị n'etiti nwoke na nwanyị nke ụdị dioecious na-esiri ike mgbe niile, ndị na-eto okooko osisi, osisi na ihe ọkụkụ ndị ọzọ ga-amụta iji chọpụta mmekọahụ. Okooko nke ụmụ nwoke nwere stamens dotted na pollen, na ihere ha bụ underdeveloped. Nwanyi okooko osisi fọrọ nke nta ka mgbe enweghi stamen.
Ọ bụrụ na osisi dị n’ubi ahụ amịghị mkpụrụ, mgbe ahụ o yikarịrị ka ọ bụ nke ụdị dioecious. Iji dozie ọnọdụ ahụ, ịkwesịrị ịkụ osisi nke otu ụdị ahụ n'akụkụ ya, wee nwee ekele maka a beụ na-enyere okooko osisi aka, osisi ahụ ga-amalite ịmị mkpụrụ.
Nwoke okooko osisi nke dioecious osisi na-emekarị na-emepụta ọtụtụ pollen. Nke a bụ n'ihi n'eziokwu na ụmụ nwanyị anaghị eto eto mgbe niile, nke pụtara na enwere pollen ga-ezuru osisi nwanyị toro eto. Ọ dị mfe ma nwee ike ịgbasa na mpaghara ndị dị anya site na ikuku ifufe.
Kedu ka esi eme polio na-eme?
Fig bụ osisi dioecious, na ihe atụ ya, anyị ga-atụle otu esi eme pollination. Ọ nwere obere okooko osisi na-enweghị atụ. Pollination bụ n'ihi blastophagous wasps. Nwanyị nke ụdị a na-achọ okooko nwoke nke ụmụ nwoke na-anọ ọdụ. N'ihi ya, ebu na-anakọta pollen site na okooko osisi nwoke wee na-agbadata ifuru nwanyị ifuru. Ya mere, Fertilization etịbe ke wasps, na ekele ha, fig okooko osisi na-pollinated.
Dioeciousness bụ mmegharị pụrụ iche nke ahịhịa, nke gosipụtara n'eziokwu na otu ụdị nwere ụmụ nwanyị na ụmụ nwoke, mana ọ na-esikarị ike ịchọpụta mmekọahụ ha. N'ọnọdụ ndị dị otú ahụ, ndị na-azụ ihe na-anwa ịmị ụdị mkpụrụ osisi ọhụrụ ka ọ bụrụ na ndị na-elekọta ubi n'ọdịnihu agaghị enwe nsogbu na ọmụmụ nke kụrụ.
