Ngokuphambene nalokho kokukhulelwa impova: izici nezici nobuntu izinqubo

Impova kanye kokukhulelwa kukhona izinqubo ebaluleke kakhulu ukuthi ahlinzeke ukukhiqizwa kabusha okuzala ka izimila eziveza imbewu. Yini kokukhulelwa Ngokungafani impova uzobe kafushane okuxoxwe ngazo kulesi sihloko. indima yabo ngokwemvelo kubaluleke kakhulu. Ngakho, ngiyabonga kubo bonke izithelo zakho ozithandayo akhiwa. Ngakho ake ukubhekana ndawonye.

Uyini umehluko sokukhulelwa ngezinyosi ezithutha impova biology uzokuphendula

Zombili lezi izinqubo zenzeka kuphela abameleli seminyango gymnosperms futhi angiosperms. Ukuze wenze lokhu, banayo izitho ekhethekile ka ukuzala. Ngo gymnosperms, amaningi awo AmaConifers, njengoba nje kuvamile namanje iduna Izigaxa zesifazane. Abanaso yakha izimbali, ngokungafani angiosperms, okuyinto anesikhundla evelele emhlabeni. Izingxenye eziyinhloko izimbali zabo kukhona stamen futhi pistil ukuhlinzeka okuzala ukukhiqizwa kabusha inqubo. Yini kokukhulelwa Ngokungafani impova? Ukuze siphendule lo mbuzo, ake siqale ngokucabangela ubunjalo yalezi zinhlelo.

Iyini impova

Impova e nezitshalo eziqhakazayo yinqubo edlulisela impova kusuka anther ukuze inhlamba of the stamens pistil. Kungani le nqubo kuyadingeka ukuqinisekisa ukuthi kwakukhona nokuhlanganiswa gametes? Zonke daba isakhiwo imbali. Owesilisa ubulili amaseli izitshalo ephakeme abizwa ngokuthi isidoda. Basuke fixed, ziningi futhi zitholakala stamens anther enamathiselwe intambo. gamete Female ngokuthi iqanda. Kuyinto sisebunyeni itholakala engxenyeni engezansi pestle enwetshiwe - esibelethweni. Yini kokukhulelwa Ngokungafani impova? Endabeni yesibili, gametes iduna nensikazi anixhunyiwe. Impova kuhilela ukudluliselwa isidoda phezulu pistil, batawuhlala kuphi ukuqala indlela yabo ukuba iqanda. Kungenzeka ngezindlela eziningana.

izinhlobo impova

Ukuze siphendule lo mbuzo kuyini umehluko ukuvundiswa dusting, kubalulekile ukuba sicabangele nezinhlobo zalo. Kunezindlela ezimbili eziyinhloko. Lena impova wemvelo futhi yokufakelwa. Eyokuqala ihilela ukudluliselwa impova umoya, amanzi, noma abamele kwezilwane. Kukholakala ukuthi zikhiqiza izinambuzane kuphela: izinyosi, iminyovu, bumblebees, izimvemvane kanye nabanye. Kodwa le nqubo yenziwa kanye kancane izinyoni - sunbirds kanti amalulwane, nezilwane ezincane, njenge Couscous. izitshalo Entomophilous babe izimbali ezinkulu nge Corolla egqamile futhi iso ukunambitheka. Ngezinye izikhathi basuke ahlanganyela kulokhu inflorescence ukuheha kangcono. Ziyakwazi kanzima ukuze bangaphuthi. izitshalo Wind-impova kukhona njalo amancane ukucasha. Artificial indlela umuntu okhipha ukuze bathole izithelo isivuno.

Kuyini kokukhulelwa

Ukuvundisa - yinqubo ukuhlanganisa amaseli ocansini. Yini kokukhulelwa Ngokungafani impova? Okokuqala, inqubo yokuqala futhi umphumela akunakwenzeka ngaphandle yesibili. Phakathi impova, isidoda zivuliwe inhlamba. Kodwa ukuze sifinyelele iqanda, kumelwe lwegciwane ukuthuthukiswa tube. Sikhula, futhi nalo, liyasondela enjongweni yakhe futhi isidoda.

Izici kokukhulelwa double zezimbali

Ezikhiqiza amaqanda namangqamuzana ezimbili pistil. Lona iqanda emaphakathi lwegciwane. Ngakho-ke, ngo-inqubo ukuvundisa abathintekayo ezimbili germ cells besilisa. Nokuhlanganiswa iqanda nesidoda esizayo kuqala isitshalo umbungu kwakhiwa. Iqukethe zonke izingxenye ezidingekayo: impande, ihlumela, leaf, Isiqu. A yi kwesidoda kokukhulelwa emaphakathi lwegciwane iseli yesibili kuyinto endosperm. Lokhu reserve izakhamzimba. Endosperm nge lwegciwane akha imbewu, elisetendeni eziqhakazayo ngaphakathi izithelo, futhi gymnosperms - evulekile esikalini Izigaxa. Nakhu-ke kokukhulelwa umehluko impova. Lona ngumphumela. Phakathi impova, kokukhulelwa kwenzeka. Gametes anixhunyiwe, ngaphandle kwezimbalwa ezithi ukunyakaza yabo mechanical. Impova kwenzeka njalo kuqala futhi zidinga ukungenela amabutho angaphandle: izilwane, umoya, amanzi, izinambuzane. Umphumela sokukhulelwa kukhona imbewu kanye nezithelo. Kuthatha indawo ngaphandle kokuphazanyiswa zangaphandle.

Lokho umehluko phakathi impova kokukhulelwa. Lokhu ukulandelana izinqubo eziyimbangela yokuhlupheka ngokobulili ukukhiqizwa kanye imbewu izitshalo.