2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv prophase, niam txiv ntawm tes chromosomes - uas tau duplicated thaum lub sij hawm S theem - condense thiab ua ntau txhiab zaus ntau compact dua lawv nyob rau hauv interphase.
Yuav ua li cas rau cov chromosomes duplicated thaum prophase kuv?
Lub sijhawm prophase I, chromosomes condense thiab pom hauv lub nucleus. … Thaum kawg ntawm prophase I, cov khub tsuas yog tuav ua ke ntawm chiasmata xwb; lawv hu ua tetrads vim plaub tus muam chromatids ntawm txhua khub ntawm homologous chromosomes tam sim no pom.
Thaum lub sijhawm twg cov chromosomes tau duplicated?
Nyob rau hauv interphase, lub xovtooj loj hlob tuaj thiab cov DNA DNA tau sib npaug. Interphase yog ua raws li theem mitotic. Thaum lub sij hawm mitotic theem, cov duplicated chromosomes yog segregated thiab faib mus rau hauv tus ntxhais nuclei.
Yuav ua li cas chromosomes duplicated hauv prophase?
Lub sijhawm prophase cov nucleoli ploj thiab cov chromatin fibers tuab thiab luv kom tsim cov chromosomes tsis sib xws pom nrog lub teeb tsom. Txhua tus chromosome replicated tshwm li ob chromatids zoo tib yam koom nrog ntawm centromere.
Nyob rau theem twg ntawm mitosis ua cov chromosomes dua?
Raws li qhia ntawm no, DNA rov ua dua thaum the S theem (synthesis theem) ntawm interphase, uas tsis yog ib feem ntawm theem mitotic. Thaum DNA replicates, ib daim qauv ntawm txhua chromosome yog tsim, yog li ntawdchromosomes duplicate.
Pom zoo:
Pob lub sij hawm tso tsheb hlau luam puas tas sij hawm?
Tsis yog, helium tsis tas sij hawm. Koj yuav tsum kaw lub valve kom nruj lossis helium yuav xau dhau sijhawm. Puas yog Balloon Time tanks rov ua dua tshiab? Yog lawm, Balloon Time tanks tuaj yeem rov ua dua tshiab. Lub sijhawm balloon lub tank ntev npaum li cas?
Thaum lub sij hawm txoj cai mughal lub npib tooj liab hu ua?
A Dam yog ib lub npib tooj liab me me. Lub npib yog thawj zaug qhia los ntawm Sher Shah Suri thaum lub sij hawm nws txoj cai ntawm Is Nrias teb ntawm 1540 thiab 1545, nrog rau Mohur, lub kub npib thiab Rupiya cov nyiaj npib. Dab tsi yog npib thaum lub sijhawm Mughal hu ua?
Lub sij hawm spur ntawm lub sij hawm los ntawm qhov twg?
Ib tug spur yog ib tug spiked txuas rau ntawm ib tug caij tsheb kauj vab uas yog siv los yaum tus nees mus rau hauv kev txiav txim. Nyob rau hauv thaum ntxov 1500s, kab lus ntawm lub spur txhais tau hais tias nyob rau hauv ceev ceev. Cov lus no tau hloov zuj zus mus rau niaj hnub no, nyob rau lub sijhawm tam sim no, thawj zaug siv ib ncig ntawm 1800 los txhais tau tias ua ib yam dab tsi tsis tau xav txog, ua kom tsis muaj zog.
Formula rau lub sij hawm lub sij hawm seem?
Tus qauv ntawm lub sijhawm yog muab los ntawm [M 0 L 0 T 1 . Or, T=√[M 0 L 1 T 0 ] × [M 0 L 1 T - 2 - 1 =√[T 2 ]=[M 0 L 0 T 1 ]. Yog li ntawd, lub sij hawm yog dimensionally sawv cev li [M 0 L 0 T 1]
Puas lub sij hawm mus sij hawm ntev li qub?
Qhov ntev ntawm kev coj khaub ncaws txawv ntawm poj niam mus rau poj niam, tab sis qhov nruab nrab yog yuav tsum muaj lub caij nyoog txhua 28 hnub. Lub voj voog tsis tu ncua uas ntev dua lossis luv dua li qhov no, txij li 21 txog 40 hnub, yog qhov qub.
