Puas yog xylem muaj cell membrane?
Puas yog xylem muaj cell membrane?

Video: Puas yog xylem muaj cell membrane?

Video: Puas yog xylem muaj cell membrane?
Video: Клеточная мембрана 2024, Lub rau hli ntuj
Anonim

Cov xyem parenchyma hlwb uas ciam teb cov hlab ntsha hauv angiosperms, hu ua kev sib cuag hlwb (saib ntu ntawm xyem refilling), yog characterized muaj ib phab ntsa txheej deposited ntawm lub ntshav membrane ntawm parenchyma ntawm tes thiab lub nkoj uas nyob ib sab-parenchyma qhov daim nyias nyias , hu ua txheej amorphous lossis txheej tiv thaiv.

Ib yam nkaus, xylem puas muaj phab ntsa ntawm tes?

Xylem cov hlab ntsha yog cov saw ncaj ncaj ua los ntawm tawv tawv tuag ntev hlwb lub npe hu ua cov hlab ntsha. Lub nkoj muaj tsis muaj cytoplasm. Lawv tsis nyob, tab sis yog tsim los ntawm kev ua neej hlwb . Lawv muaj ib lignified cell phab ntsa thiab lub hauv paus kab noj hniav.

Qhov thib ob, xylem muab kev txhawb nqa li cas? Xylem yog cov ntaub so ntswg tshwj xeeb ntawm cov nroj tsuag vascular uas thauj cov dej thiab cov as-ham los ntawm cov nroj tsuag-av interface mus rau stems thiab nplooj, thiab muab txhua yam txhawb nqa thiab ruaj khov. Cov xyem hlwb thiab txhawb nqa qhov hnyav ntawm cov dej thauj mus rau hauv cov nroj tsuag thiab qhov hnyav ntawm cov nroj tsuag nws tus kheej.

Thiab cov lus nug yog, xylem puas muaj lub nucleus?

Tsis zoo li xyem , phloem tseem muaj txoj sia nyob, tab sis feem ntau nrog cov ntsiab lus ntawm tes txo qis thiab tsis muaj cev . Qee cov nroj tsuag nyob hauv av, uas yog mosses, ua tsis muaj xyem thiab phloem. Hloov chaw, gametophytes ntawm ntau mosses muaj dej ua cov hlwb hu ua hydroids.

Nyob qhov twg xylem hlwb pom?

Xylem tuaj yeem yog pom : hauv cov hlab ntshav, nthuav tawm hauv cov ntoo tsis yog ntoo thiab qhov tsis yog ntoo ntawm cov ntoo ntoo. hauv theem nrab xyem , tso los ntawm meristem hu ua vascular cambium hauv cov ntoo ntoo. raws li ib feem ntawm ib tug stelar kev npaj tsis muab faib ua bundles, raws li nyob rau hauv ntau ferns.

Pom zoo: