Video: Dab tsi yog ob lub fertilization piav qhia txheej txheem ntawm ob zaug fertilization?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Ob chav fertilization yog ib txoj fertilization mechanism ntawm paj ntoo (angiosperms). Qhov no txheej txheem koom nrog kev koom nrog ntawm poj niam gametophyte (megagametophyte, tseem hu ua lub hnab embryo) nrog ob tus txiv neej gametes (phev). Qee cov nroj tsuag tuaj yeem tsim polyploid nuclei.
Ib yam li ntawd, tej zaum koj yuav nug, dab tsi yog qhov txheej txheem ntawm fertilization ob?
Muab ob npaug rau fertilization koom nrog ob lub phev hlwb; ib tug fertilizes qe cell los tsim lub zygote, thaum lwm yam fuses nrog ob tug polar nuclei uas tsim cov endosperm. Tom qab fertilization , cov chiv ovule tsim cov noob thaum cov ntaub so ntswg ntawm zes qe menyuam ua cov txiv hmab txiv ntoo.
Tsis tas li ntawd, vim li cas cov txheej txheem ntawm fertilization hauv angiosperms raug xa mus ua ob zaug fertilization? Fertilization hauv paj cov nroj tsuag raug xa mus ua as ob fertilization vim hais tias ob leeg txiv neej gametes ntawm tib microspore koom nrog fusion. Ib qho fuses nrog lub qe los tsim cov diploid zygote, thiab lwm qhov fuses nrog ob lub ntsiab lus ntawm lub cev (los yog cov nuclei thib ob) los tsim cov triploid thawj endosperm nucleus.
Tom qab ntawd, lo lus nug yog, dab tsi yog ob chav fertilization nrog daim duab?
Cov txheej txheem ntawm fusion ntawm ib tus txiv neej gamete nrog lub qe nrog rau kev sib koom ua ke ntawm tus txiv neej thib ob gamete nrog ob lub ncov qaumteb qabteb lossis ob lub nucleus thib ob hu ua ob chav fertilization . Tawm ntawm ob tug txiv neej gametes, ib tug fuses nrog lub qe mus nqa tawm generative fertilization los yog syngamy.
Ob chav fertilization Class 11 yog dab tsi?
(a) Ob chav fertilization txhais tau tias kev sib xyaw ntawm ib tus txiv neej gamete nrog lub qe qe thiab lwm tus txiv neej gamete nrog lub ncov qaumteb qabteb, qhov no hu ua triple fusion.
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