Puas yog cov hlwb nyob nrog?

Cov txheej txheem:

Puas yog cov hlwb nyob nrog?
Puas yog cov hlwb nyob nrog?

Video: Puas yog cov hlwb nyob nrog?

Video: Puas yog cov hlwb nyob nrog?
Video: Mang Vang New Song 2020 - puas yog vim kuv [Official Video] 2024, Kaum ib hlis
Anonim

Cov hlwb yog cov hlwbuas txuas nrog rau cov tub ntxhais sib txuas ntawm phloem los ntawm plasmodesmata.

Puas yog cov hlwb nyob los yog tuag?

Hint: Nyob rau hauv phloem ob leeg cell thiab sieve tubes yog cov hlwb nyob. Ob leeg muaj cytoplasm. Ua kom tiav cov lus teb: Hauv cov nroj tsuag phloem thiab Xylem pom raws li vascular bundles. … Phloem fibers tuag lawm.

Vim li cas cov hlwb ua ke nyob?

Cov hlwb sib koom yog cov hlwb tshwj xeeb parenchyma hauv phloem cov ntaub so ntswg ntawm angiosperms. Lawv yog nucleated nyob hlwb nrog ntau ribosomes, plastids, thiab mitochondria. … Ib tug khub ntawm tes thiab cov khoom sieve txuam muaj kev sib raug zoo ontogenic, uas txhais tau hais tias lawv tau sawv los ntawm ib lub cell progenitor.

Yuav ua li cas thaum tus khub cell tuag?

Vim tias tsis muaj qee yam organelles, lub xov tooj yuav tsum tau cia siab rau cov organelles los ntawm cov hlwb ua ke. Tus khub ntawm tes yuav ua tiav tag nrho cov kev ua haujlwm metabolic ntawm cov tswv cuab sieve-tube. Yog tsis muaj tus khub ntawm tes, tus neeg sab hauv lub raj yuav tuag, ceasing phloem function, thiab yog li tua cov nroj tsuag.

Tus khub cell yog dab tsi?

: ib lub cell nucleated uas nyob ze rau hauv keeb kwm, txoj hauj lwm, thiab tej zaum ua haujlwm nrog lub xovtooj ua ib feem ntawm lub raj dej ntawm cov nroj tsuag vascular.

Pom zoo: