Mesarch xylem yog xwm txheej uas protoxylem hauv thawj xylem strand tsim thawj zaug hauv nruab nrab ntawm txoj hlua thiab txuas ntxiv txhim kho ob qho tib si centrifugally thiab centripetally, piv txwv li. nyob rau hauv tua ntawm ferns.
Mesarch yog dab tsi?
: muaj metaxylem tsim ob sab hauv thiab sab nraud rau protoxylem.
Mesarch hauv botany yog dab tsi?
adjective. Botany. (ntawm thawj xylem lossis hauv paus) txhim kho los ntawm ob qho tib si periphery thiab qhov chaw; muaj cov hlwb laus puag ncig los ntawm cov menyuam yaus.
centripetal xylem yog dab tsi?
Nyob rau hauv cov xwm txheej exarch, qhov kev loj hlob ntawm xylem tshwm sim ntawm qhov chaw. Vascular nroj tsuag tuaj yeem muaj ntau tshaj ib txoj hlua ntawm thawj xylem hauv lawv cov qia lossis hauv paus. … Hauv lwm lo lus, yog qhov kev loj hlob / kev loj hlob ntawm xylem mus rau qhov chaw, nws yog hu ua centripetal lossis exarch xylem.
Endarch Exarch thiab Mesarch yog dab tsi?
Endarch thiab exarch yog ob ntawm plaub hom thawj xylem txoj kev loj hlobLwm ob yog centrarch thiab mesarch. Lawv raug cais raws li kev npaj ntawm protoxylem thiab metaxylem hauv thawj cov ntaub so ntswg xylem. Tsis tas li ntawd, ntau tshaj ib txoj kab ntawm thawj xylem tsim nyob rau hauv ob qho tib si endarch thiab exarch.
