Video: Lub stele yog dab tsi thiab nws nyob qhov twg?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Stele (biology) Hauv cov hlab ntshav cog, stele yog lub hauv paus nruab nrab ntawm cov hauv paus hniav lossis cov qia uas muaj cov ntaub so ntswg los ntawm cov procambium. Cov no suav nrog cov ntaub so ntswg, qee zaum cov ntaub so ntswg hauv av (pith) thiab lub pericycle, uas, yog tias tam sim no, txhais tau hais tias tus ciam teb sab nraud stele.
Hauv qhov no, Prostele yog dab tsi?
cov tshuaj tiv thaiv . pro·to·stele. Ib qho yooj yim, txheej txheem txheej txheem ntawm kev ua cov ntaub so ntswg hauv stems thiab cov hauv paus hniav ntawm qee cov nroj tsuag qis, muaj ib lub tog raj kheej ntawm xylem ncig los ntawm ib txheej ntawm phloem. Keeb kwm ntawm protostele.
Ib qho ntxiv, Pericycle ua los ntawm dab tsi? Hauv cov hauv paus ntoo, lub tog raj kheej ntawm cov ntaub so ntswg cog nruab nrab ntawm endodermis thiab phloem. Pericycle tej zaum yuav muaj los ntawm parenchyma hlwb los yog sclerenchyma hlwb los yog ob qho tib si. Lateral ceg thiab phellogen tuaj yeem tshwm sim los ntawm tsheb kauj vab . Nws yog tsim los ntawm alternate bands ntawm parenchymatous thiab sclerenchymatous hlwb.
Xav txog qhov no, pom Protostele nyob qhov twg?
qauv nyob rau hauv vascular nroj tsuag hom stele yog cov cov tshuaj tiv thaiv , nyob rau hauv uas lub xylem yog nyob rau hauv nruab nrab ntawm lub qia, surrounded los ntawm ib tug nqaim band ntawm phloem.
Dab tsi yog Siphonostele hauv biology?
npe. Lub stele uas cov ntaub so ntswg voos yog nyob rau hauv daim ntawv ntawm lub tog raj kheej ib puag ncig pith, zoo li hauv cov qia ntawm feem ntau cov ferns thiab lwm yam tsis muaj vascular cog.
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