2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub sijhawm prophase, lub nucleus ploj, spindle fibers daim ntawv, thiab DNA condenses rau hauv chromosomes (tus muam chromatids). Thaum lub sij hawm metaphase, tus viv ncaus chromatids ua raws txoj kab nruab nrab ntawm lub cell los ntawm kev txuas lawv cov centromeres rau cov spindle fibers.
Puas muaj nucleus hauv prophase?
Nyob rau hauv prophase, lub complex ntawm DNA thiab cov proteins muaj nyob rau hauv lub nucleus, hu ua chromatin, condenses. Cov chromatin coils thiab dhau los ua compact, ua rau tsim cov chromosomes pom. … Cov viv ncaus chromatids yog khub ntawm cov ntawv luam zoo tib yam ntawm DNA koom nrog ntawm qhov chaw hu ua centromere.
Lub nucleus nyob qhov twg hauv metaphase?
Metaphase yog ib theem hauv lub voj voog ntawm tes uas txhua yam khoom siv caj ces yog condensing rau hauv chromosomes. Cov chromosomes ces pom tau. Thaum lub sijhawm no, cov nucleus ploj mus thiab cov chromosomes tshwm sim hauv cytoplasm ntawm lub xovtooj.
Puas muaj nucleolus hauv metaphase?
Ntawm metaphase, lub mitotic spindle tsim ib qho dav dav tag nrho embedded nyob rau hauv lub nucleolus. Lub nucleolus tau muab cais ua ob pawg discreet txuas los ntawm ib pawg tuab ntawm microtubules raws li cov spindle elongated.
Lub nucleus nyob rau hauv interphase nyob qhov twg?
Lub interphase nucleus yog ib yam ntawm eukaryotic nucleus, nrog chromatin txuas rau hauv daim nyias nyias ntawm lub hnab ntawv nuclear. Ib tug nucleolus tshwm sim nyob rau hauv lubnucleus.
Pom zoo:
Qhov khoom nyob rau pem hauv ntej ntawm lub lens diverging nyob qhov twg?
Teb: Dav hlau daim iav Dav Hlau Daim iav Rau lub teeb rays tawm lub dav hlau daim iav, lub lub kaum sab xis ntawm kev xav sib npaug ntawm lub kaum sab xis ntawm qhov xwm txheej. … Daim duab tsim los ntawm daim iav dav hlau yog ib txwm virtual (lub ntsiab lus tias lub teeb rays tsis yog los ntawm daim duab), upright, thiab ntawm tib lub duab thiab loj npaum li cov khoom nws yog reflecting.
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.
Ntawm qhov capillaries pom nyob rau hauv lub cev nyob qhov twg?
Nruam: Cov capillaries no tsis muaj perforations thiab cia tsuas yog me me molecules dhau mus. Lawv tam sim no hauv nqaij, tawv nqaij, rog, thiab paj hlwb. Fenestrated: Cov capillaries no muaj cov pores me me uas tso cai rau cov molecules me los ntawm thiab nyob hauv cov hnyuv, ob lub raum, thiab cov qog endocrine.
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.
Leej twg yog bennie nyob rau hauv lub raisin nyob rau hauv lub hnub?
Beneatha Younger ("Bennie") Mama tus ntxhais thiab W alter tus muam. Beneatha yog ib tug neeg txawj ntse. Nees nkaum xyoo, nws mus kawm ntawv qib siab thiab kawm tau ntawv zoo dua li lwm cov Tsev Neeg Hluas. Qee qhov ntawm nws tus kheej kev ntseeg thiab kev xav tau ua rau nws nyob deb ntawm niam txiv.
