Video: Puas yog fertilization ib feem ntawm meiosis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Meiosis yog kev faib txo. Yog li meiosis tsim gametes (sex hlwb), txhua tus nrog ib nrab ntawm tag nrho cov chromosomes. Tom qab ntawd lub qe cell thiab cov phev cell sib sau ua ke ( fertilization ), tsim cov zygote nrog tag nrho cov chromosomes.
Yog lawm, yog fertilization meiosis los yog mitosis?
Mitosis ua rau yuav luag tag nrho cov hlwb hauv lub cev. Ib hom kev faib cell sib txawv hu ua meiosis ua rau cov phev thiab qe. Thaum fertilization cov phev thiab qe sib sau ua ib lub cell hu ua zygote uas muaj chromosomes los ntawm cov phev thiab qe.
Ib yam li ntawd, uas yog ib feem ntawm meiosis tab sis tsis yog mitosis? Cov xwm txheej uas tshwm sim hauv meiosis tab sis tsis yog mitosis suav nrog homologous chromosomes ua ke, hla dhau, thiab tetrads nyob rau hauv daim ntawv ntawm metaphase.
Cia li xav txog qhov no, nyob rau theem twg ntawm meiosis fertilization tshwm sim?
Tom qab ovulation , txhua oocyte txuas ntxiv mus metaphase ntawm meiosis II . Meiosis II tsuas yog ua kom tiav yog tias fertilization tshwm sim, ua rau fertilized mature ovum thiab ob lub cev polar. Yog li ntawd, nyob rau hauv luv luv, lub qe yog daig nyob rau hauv metaphase II mus rau fertilization.
4 kauj ruam ntawm fertilization yog dab tsi?
Cov theem ntawm fertilization tuaj yeem muab faib ua plaub Cov txheej txheem: 1) phev npaj, 2) phev-qe lees paub thiab khi, 3) phev-qe fusion thiab 4 ) fusion ntawm phev thiab qe pronuclei thiab ua kom lub zygote.
Pom zoo:
Qhov feem ntawm 33 1 3 feem pua yog dab tsi?
Piv txwv tus nqi feem pua ntawm cov zauv feem 25% 0.25 1/4 331/3% 0.333 1/3 50% 0.5 1/2 75% 0.75 3/4
Yuav ua li cas koj sau ib feem raws li ib tug khoom ntawm ib tug tag nrho cov zauv thiab ib feem feem?
Cov cai los nrhiav cov khoom ntawm ib feem feem thiab tag nrho tus lej Peb xub sau tag nrho cov lej ua ib feem, piv txwv li, sau nws faib los ntawm ib qho; Piv txwv li: 7 yog sau ua 71. Peb mam li muab cov zauv. Peb muab cov denominators. Yog tias yuav tsum tau ua kom yooj yim, nws ua tiav thiab tom qab ntawd peb sau cov feem kawg
Puas yog cov viscosities ntawm magmas nce nrog nce feem pua ntawm silica?
Lub viscosities ntawm magmas nce nrog nce feem pua ntawm silica. Kev tawg ntawm Hawaii volcanoes tej zaum yuav piav raws li tawg nyob rau hauv piv rau 1980 Mount St. Helens eruption. Basaltic lavas feem ntau yog kub dua thiab khov dua li andesite lavas
Dab tsi yog 3 feem ntawm ib feem?
Tus lej sab saum toj ntawm ib feem yog hu ua nws tus lej thiab hauv qab yog nws tus lej
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua