2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hypogeal germination txhais tau tias cotyledons nyob hauv av. Lub epicotyl (ib feem ntawm qia saum lub cotyledon) loj hlob, thaum lub hypocotyl (ib feem ntawm lub qia hauv qab lub cotyledon) tseem zoo ib yam nyob rau hauv ntev. … Nquag, cov cotyledon yog nqaij, thiab muaj ntau cov as-ham uas siv rau germination.
Yuav ua li cas rau qhov kev loj hlob ntawm hypogeal?
Nyob rau hauv cov germination hypogeous, cov hypocotyl tseem luv thiab cov cotyledons tsis tawm ntawm cov noob tab sis theej quab yuam lub radicle thiab epicotyl axis kom elongate tawm ntawm lub tsho tiv no. Cov noob, nrog rau cov cotyledons kaw, tseem nyob hauv av, thiab cov epicotyl loj hlob los ntawm…
Ib qho piv txwv ntawm hypogeal germination yog dab tsi?
Nyob rau hauv hypogeal germination, cov cotyledons nyob hauv av. Tab sis, nyob rau hauv epigeal germination, lub hypocotyls thawj zaug tuaj saum av saum npoo thiab ces ncaj. Piv txwv ntawm hypogeal germination yog gram, pea, thiab lwm yam. Piv txwv ntawm epigeal germination yog av txiv ntoo, taum, thiab lwm yam.
Tus qauv ntawm kev cog qoob loo yog dab tsi?
Tom qab cov hauv paus nqus dej, ib qho embryonic tua tawm ntawm cov noob. Qhov kev tua no suav nrog peb qhov tseem ceeb: cov cotyledons (noob nplooj), ntu ntawm tua hauv qab cotyledons (hypocotyl), thiabntu ntawm tua saum cov cotyledons(epicotyl). Txoj kev tua tawm txawv ntawm pawg nroj tsuag.
Cov qoob loo twg hauv qab nocov noob sawv cev rau cov noob qoob noob qoob noob qoob loo?
Ntawm dicotyledons, gram, pea (Fig. 4.2), groundnut yog ib co piv txwv ntawm hypogeal germination. Nyob rau hauv monocotyledons (piv txwv li, nplej, pob kws, mov, txiv maj phaub) radicle thiab plumule tawm los ntawm kev tho lub coleorrhiza thiab coleoptile feem. Lub plumule hlob tuaj thiab thawj nplooj tawm los ntawm coleoptile.
Pom zoo:
Pob noob noob noob noob nom noob tswv los?
Cov noob noob hnav tuaj yeem tshwm sim hauv Asia lossis East Africa, thiab cov neeg Iyiv thaum ub tau paub tias tau siv cov noob hauv av ua hmoov nplej. Cov noob tau siv los ntawm Suav tsawg kawg yog 5,000 xyoo dhau los, thiab ntau pua xyoo lawv tau hlawv cov roj los ua cov tshuaj tsw qab rau cov ntawv suav zoo tshaj plaws.
Nyob rau hauv noob caj noob ces yog dab tsi genotype ntawm hh txhais tau tias?
Lub hauv paus ntawm lo lus no txhais tau tias "tseem" thiab lawv yog tib yam. HH yog ob lub peev thiab hh yog ob qho tib si qis. HH yog homozygous dominant, vim yog lub peev. HH homozygous recessive? Ib lub taub hau tag nrho cov plaub hau yog qhov tseem ceeb, nrog rau homozygous gene ntawm HH.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?
Detering yog tus neeg ua liaj ua teb los ntawm Txhua Tus Neeg Tsis Txaus Siabntawm Sab Hnub Poob los ntawm Erich Maria Remarque. Nws muaj siab mos siab muag, tshwj xeeb tshaj yog thaum nws los txog rau nees. Nws muaj kev kub ntxhov loj heev thaum nws hnov cov nees quaj thiab txawm sim tua lawv kom kawg lawv txoj kev txom nyem.
Nyob rau hauv tus neeg nqa khoom tsib tus qauv?
Tus Neeg Ua Haujlwm Tsib Lub Zog yogua haujlwm rau kev tshuaj xyuas lub tuam txhab kev sib tw ib puag ncig. Tus naj npawb thiab lub zog ntawm lub tuam txhab kev sib tw cov neeg sib tw, cov neeg tuaj yeem ua lag luam tshiab, cov neeg muag khoom, cov neeg siv khoom, thiab cov khoom hloov pauv cuam tshuam rau lub tuam txhab cov txiaj ntsig.
