Video: Dab tsi ua apical meristem tsim?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
apical meristem . A meristem ntawm qhov kawg ntawm tsob ntoo tua lossis hauv paus qhov ntawd tsim tawm auxin thiab ua rau tua lossis hauv paus kom ntev ntxiv. Kev loj hlob uas pib hauv apical meristem yog hu ua thawj txoj kev loj hlob.
Hauv txoj kev no, dab tsi tua apical meristem tsim?
Tua apical meristem . Tua apical meristem yog thaj av hauv kev loj hlob tua muaj meristematic hlwb. Cov tua apical meristem muaj multipotent qia hlwb thiab tsim tawm primordia uas loj hlob mus rau txhua qhov hauv av hauv nruab nrog cev ntawm cov nroj tsuag.
Ntxiv mus, dab tsi yog apical meristem pom? Apical meristem yog thaj av uas faib cov cell sai pom ntawm tsob ntoo lub hauv paus thiab tua cov lus qhia. Kev faib ntawm cov cell no ib txwm ua rau muaj kev loj hlob thawj (ntsug), ob qho tib si ntawm lub hauv paus thiab tua. Hom ntaub so ntswg tsis txawv.
Tib neeg tseem nug, qhov haujlwm ntawm apical meristem yog dab tsi?
Apical meristem, tseem hu ua "kev cog qoob loo," yog cov ntaub so ntswg meristematic tsis txawv ntawm pom hauv cov paj ntoo thiab cog cov lus qhia ntawm cov hauv paus hniav hauv cov nroj tsuag. Nws lub luag haujlwm tseem ceeb yog ua kom lub kev loj hlob ntawm cov cell tshiab hauv cov tub ntxhais hluas cov yub ntawm cov lus qhia ntawm cov hauv paus hniav thiab tua thiab tsim cov paj.
Muaj pes tsawg apical meristems nyob ntawm tsob ntoo?
ob lub apical meristem
Pom zoo:
Dab tsi yog lub npe ntawm cov khoom tsim uas yog qhov tseem ceeb rau kev pib tsim cov ntshav khov?
Thrombocytes (platelets) Megakaryocytes tsim los ntawm hemocytoblasts hauv cov pob txha liab. Thrombocytes dhau los ua nplaum thiab sib sau ua ke los ua cov platelet ntsaws uas kaw qhov tawg thiab kua muag hauv cov hlab ntshav. Lawv kuj pib tsim cov ntshav txhaws
Nyob rau theem dab tsi ntawm kev tsim cov kab mob fungal yog diploid cells tsim?
Hauv lub neej voj voog ntawm kev sib deev kis tus kab mob hu ua fungus, theem haploid hloov nrog qib diploid. The haploid theem xaus nrog nuclear fusion, thiab theem diploid pib nrog kev tsim zygote (diploid cell ua los ntawm fusion ntawm ob haploid cells)
Dab tsi yog qhov sib txawv ntawm thawj thiab theem nrab meristem?
Thawj Meristem: Thawj meristems yog cov xeeb leej xeeb ntxwv ntawm cov hlwb embryonic. Piv txwv: apical meristem ntawm tua apex thiab hauv paus apex. (2). Secondary Meristem: Qhov thib ob meristems yog cov ntaub so ntswg meristematic tshwm sim los ntawm cov ntaub so ntswg tas mus li
Cov kab mob hauv qhov ncauj dab tsi metabolize sucrose tsim cov nplaum glucans thiab tsim cov quav hniav?
GTF yog qhov tseem ceeb enzyme uas catalyzes sucrose rau nplaum glucans thiab pab txhawb kev tsim cov hniav plaque nyob rau hauv uas lub tsub zuj zuj ntawm metabolic acids uas ua los ntawm cov kab mob colonies ua rau lub zos demineralization ntawm cov enamel nto (Loesche, 1986)
Cov ntaub so ntswg twg yog muab los ntawm apical meristem?
Apical Meristem Txheej txheem cej luam Cov ntsiab lus Cov ntsiab lus Meristematic cov qia cell zoo li cov ntaub so ntswg uas tsim cov cell uas tsis sib txawv uas tuaj yeem dhau los ua cov nroj tsuag xav tau Apex/apices qhov kawg lossis qhov kawg, ntawm qee yam kev loj hlob thawj zaug apical meristem ua rau tsob ntoo loj tuaj thiab nqis kom tau txais ntev dua