2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib cambium (plural cambia lossis cambiums), hauv cov nroj tsuag, yog txheej txheej ntaub so ntswg uas muab cov hlwb tsis sib xws rau cov nroj tsuag loj hlob. Nws muaj nyob rau hauv thaj tsam ntawm xylem thiab phloem. Nws tsim cov kab sib txuas ntawm cov hlwb, uas ua rau cov ntaub so ntswg thib ob.
cambium tshwm sim nyob qhov twg?
Cov vascular cambium thiab cork cambium yog cov meristems theem nrab uas tau tsim hauv stems thiab cov hauv paus hniav tom qab cov ntaub so ntswg ntawm thawjcog lub cev muaj qhov sib txawv. Lub vascular cambium yog lub luag haujlwm rau kev nce txoj kab uas hla ntawm stems thiab cov hauv paus hniav thiab tsim cov ntaub so ntswg.
Qhov chaw thiab kev ua haujlwm ntawm cambium yog dab tsi?
Lub luag haujlwm tseem ceeb ntawm cambium yog txhawm rau txhawb kev loj hlob ntawm theem nrab xylem thiab phloem. Nws nyob ncaj qha ntawm thawj xylem thiab phloem nyob rau hauv ib txheej ncig. Feem ntau, cov nroj tsuag dicot lossis gymnosperms muaj cov ntaub so ntswg cambium. Dicot yog ib tsob nroj uas muaj ob nplooj embryonic thaum germination.
cambium nyob qhov twg?
Lub vascular cambium nyob tsuas yog sab nraum thawj xylem thiab mus rau sab hauv ntawm thawj phloem. Cov hlwb ntawm vascular cambium faib thiab tsim cov xylem theem nrab (tracheids thiab cov hlab ntsha) mus rau sab hauv, thiab theem nrab phloem (sieve ntsiab thiab cov hlwb ua ke) mus rau sab nraud.
Puas muaj cambium nyob rau hauv nplooj?
Vascular cambia muaj nyob rau hauv dicots thiab gymnosperms tab sis tsis yog monocots, uas feem ntau tsis muaj theem nrabkev loj hlob. Ob peb hom nplooj kuj muaj vascular cambium. Hauv dicot thiab gymnosperm ntoo, vascular cambium yog cov kab pom tseeb cais cov tawv ntoo thiab ntoo; lawv kuj muaj cork cambium.
Pom zoo:
Qhov khoom nyob rau pem hauv ntej ntawm lub lens diverging nyob qhov twg?
Teb: Dav hlau daim iav Dav Hlau Daim iav Rau lub teeb rays tawm lub dav hlau daim iav, lub lub kaum sab xis ntawm kev xav sib npaug ntawm lub kaum sab xis ntawm qhov xwm txheej. … Daim duab tsim los ntawm daim iav dav hlau yog ib txwm virtual (lub ntsiab lus tias lub teeb rays tsis yog los ntawm daim duab), upright, thiab ntawm tib lub duab thiab loj npaum li cov khoom nws yog reflecting.
Qhov chaw ncig tebchaws nyob hauv bhagalpur nyob qhov twg?
Bhagalpur faib lub zos yog ib pawg tswj hwm thaj chaw ntawm Bihar xeev ntawm Is Nrias teb, nrog Bhagalpur ua thawj coj hauv paus chaw haujlwm. Raws li xyoo 2005, qhov kev faib muaj xws li Bhagalpur koog tsev kawm ntawv, thiab Banka koog tsev kawm ntawv thiab nyob rau ntawm ntug dej ntawm Ganga River.
Kev tsis ncaj ncees nyob qhov twg yog qhov hem rau kev ncaj ncees nyob txhua qhov chaw?
Martin Luther King tau hais tias: “Kev tsis ncaj ncees nyob txhua qhov chaw yog kev hem thawj rau kev ncaj ncees nyob txhua qhov chaw. Peb raug ntes nyob rau hauv ib tug inescapable network ntawm kev sib nrig sib pab, khi nyob rau hauv ib lub tsoos tsho ntawm txoj hmoo.
Qhov twg yog qhov tsis txaus ntseeg nyob qhov twg?
Yuav muaj ob lub cev tsis zoo nyob rau hauv lub midbrain. Lawv yog symmetrically positioned, ib tug nyob rau ntawm ob sab ntawm lub midline ntawm lub hlwb, thiab lawv tsim ob lub pob nyob rau hauv lub posterior nto ntawm lub paj hlwb nyob rau hauv qab ntawm lub superior colliculi.
Qhov twg tag nrho cov nqi hluav taws xob nyob ntawm qhov kev siv nyiaj siab tshaj plaws yog qhov twg?
marginal utility is zero. Tag nrho cov nqi hluav taws xob yog siab tshaj thaum marginal utility yog xoom. Qhov no yog vim muaj ntau txoj cai ntawm kev txo qis marginal utility uas hais tias tus neeg siv khoom noj ntau thiab ntau qhov zoo, qhov ntxiv rau tag nrho cov nqi hluav taws xob poob.
