Tracheids yog cov hlwb tsis muaj sia nyob hauv lub xylem ntawm ntau hom nroj tsuag qub, cov nroj tsuag tsis muaj kab mob (ferns, qws mosses, thiab horsetails) thiab gymnosperms (cedar, ntoo thuv, thiab ntoo cypress).
pom cov tracheids thiab xylem hlab ntsha nyob qhov twg?
Tracheids yog cov hlwb tshwj xeeb uas tsis muaj sia nyob uas muaj nyob hauv xylem ntawm cov nroj tsuag. Cov ntsiab lus no pab hauv kev siv dej thiab muab kev txhawb zog rau cov nroj tsuag. Lawv tsis perforated thiab pom nyob rau hauv seedless vascular nroj tsuag thiab gymnosperms xws li cedar, ntoo thuv, ferns, mosses, thiab lwm yam.
Dab tsi yog tracheids hauv xylem?
noun, plural: tracheids. (botany) Ib tubular cell hauv xylem ntawm cov nroj tsuag vascular uas nws lub luag haujlwm tseem ceeb yog ua dej thiab ntxhia ntsev, muab kev txhawb nqa, thiab tiv thaiv huab cua embolism hauv cov nroj tsuag vascular.
Ntawm lub nkoj twg koj yuav pom tracheids?
Ib tug tracheid yog ib tug ntev, lignified cell nyob rau hauv the xylem ntawm vascular nroj tsuag.
Puas tracheids pom hauv phloem?
Daim duab 25.4B. 1: Xylem thiab phloem: Xylem thiab phloem cov ntaub so ntswg ua rau lub cev thauj cov stems. … Cov ntaub so ntswg muaj cov hlab ntsha, ua cov hlwb, hu ua tracheids, thiab cov ntaub so ntswg txhawb nqa, hu ua parenchyma. Cov hlwb no tau koom nrog qhov kawg-rau-kawg los tsim cov raj ntev.
