Cov txheej txheem:
- YPuas yog ovule a Megasporangium?
- Puas yog embryo sac thiab ovule tib yam?
- Yuav muaj pes tsawg lub qe nyob rau hauv lub embryo sac?
- Vim li cas lub ovule hu ua Megasporangium?
Video: Puas yog megasporangium thiab ovule tib yam?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-11 03:45
'Megasporangium' yog sib npaug rau ovule, uas muaj integuments, nucleus, thiab funiculus uas nws txuas nrog lub placenta. Megasporangium nrog rau nws cov kev tiv thaiv npog cov integuments hu ua ovules.
YPuas yog ovule a Megasporangium?
Lub ovule zoo li yog a megasporangium nrog integuments ncig nws. … Megaspores nyob hauv lub ovule thiab faib los ntawm mitosis los tsim cov poj niam haploid gametophyte lossis megagametophyte, uas tseem nyob hauv lub ovule. Cov seem ntawm cov ntaub so ntswg megasporangium (lub nucellus) ncig lub megagametophyte.
Puas yog embryo sac thiab ovule tib yam?
Embryo sac is ib feem ntawm ovule.
Yuav muaj pes tsawg lub qe nyob rau hauv lub embryo sac?
Lub embryo sac lossis uas tseem hu ua poj niam gametophyte yog ib qho qauv oval uas nyob hauv lub ovule ntawm cov paj ntoo. - Tsuas muaj ib qe nyob rau hauv ib lub hnab embryo.
Vim li cas lub ovule hu ua Megasporangium?
'Megasporangium' yog sib npaug rau ovule, uas muaj integuments, nucleus, thiab funiculus uas nws txuas nrog placenta… Integuments tshwm sim hauv micropyle, thaum lub sij hawm fertilization pollen tubes nkag mus rau lub ovule los ntawm qhov qhib hu ua micropyle. Yog li, lub ovule yog ib qho integument megasporangium. >
Pom zoo:
Puas yog yug thiab moles yog tib yam?
Moles thiab birthmarks tsis tas yuav yog ib qho tib si, tab sis lawv tuaj yeem yooj yim tsis meej pem vim tias mole tuaj yeem tshwm sim thaum yug. Qee tus kws kho mob xav tias mole yog "kev zoo nkauj" vim nws yog thaj chaw pigmentated.
Puas yog lub tesseract thiab lub pob zeb qhov chaw yog tib yam?
Lub Tesseract, tseem hu ua lub voos xwmfab, yog lub pob zeb crystalline zoo li lub nkoj ntimrau lub Pob Zeb Space, ib qho ntawm rau Lub Pob Zeb Infinity uas ua rau lub ntiaj teb thiab muaj lub zog tsis muaj kev txwv.. Nws tau siv los ntawm ntau yam kev vam meej thaum ub ua ntej los rau hauv Asgardian tes, khaws cia hauv Odin's Vault .
Puas muaj ntau yam thiab ntau yam zoo ib yam?
Kev sib sib zog nqus-qhov sib txawv ntawm qhov nqaim-ntawm cov khoom lag luam txhais tau hais tias tus neeg muag khoom nqa ntau qhov sib txawv ntawm ib yam khoom. Ntau yam-qhov sib txawv ntawm qhov nqaim-ntawm cov khoom txhais tau tias tus neeg muag khoom nqa ntau yam khoom sib txawv.
Puas yog lub kaus mom thiab lub kaus mom yog tib yam?
yog tias helm yog (nautical) lub steering apparatus ntawm lub nkoj, tshwj xeeb tshaj yog lub tiller los yog lub log thaum lub rudder yog (nautical) ib tug underwater vane siv rau steer lub nkoj lub rudder. yog tswj los ntawm lub log, tiller los yog lwm yam khoom siv (hnub no cov hlab ntsha tuaj yeem tswj tau txawm tias muaj lub joystick lossis lub autopilot) .
Puas yog kev tsis sib haum xeeb thiab tsis sib haum yog tib yam?
Unconformities sawv cev rau lub sij hawm ntawm non-deposition ntawm sediment los yog active erosion ntawm strata. Nonconformity: txhim kho qhov twg sediments tau tso rau saum qhov chaw eroded ntawm igneous los yog metamorphic pob zeb. … Puas yog kev tsis sib haum xeeb thiab tsis sib haum?
