2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hauv angiosperms, zygote yog diploid thaum lub primary endosperm cell yog triploid.
Dab tsi yog triploid nyob rau hauv ib txwm angiosperm?
Kwv yees li 70% ntawm hom angiosperm muaj cov hlwb endosperm uas yog polyploid. Cov no feem ntau yog triploid (muaj peb pawg chromosomes), tab sis tuaj yeem sib txawv ntawm diploid (2n) txog 15n.
Yuav ua li cas triploid tsim hauv cov nroj tsuag angiosperm?
Ob lub phev nuclei thiab lub qe nucleus fused rau hauv zygotic nucleus hauv polyspermic zygote, thiab triploid zygote faib ua ob-celled embryo ntawm mitotic division nrog ib tug raug bipolar microtubule spindle. Ob-celled proembryo tau tsim thiab rov tsim dua tshiab rau hauv cov nroj tsuag triploid.
Qhov twg hauv qab no yog triploid?
Yog li, cov lus teb yog 'Maize endosperm. '
Lub cell twg yog diploid hauv angiosperms?
Ib tug phev nucleus fuses nrog lub qe nucleus hauv qe cell los ua ib tug diploid (2n) zygote uas loj hlob mus rau hauv lub embryo ntawm cov noob.
Pom zoo:
Qhov twg hauv qab no yog piv txwv ntawm geotropism hauv cov nroj tsuag?
Lub ntsiab lus ntawm geotropism yog kev loj hlob ntawm cov nroj tsuag lossis tsiaj tsis tuaj yeem teb rau lub zog ntawm lub ntiajteb txawj nqus. Ib qho piv txwv ntawm geotropism yog cov hauv paus hniav ntawm cov nroj tsuag loj hlob mus rau hauv av.
Tus xov tooj hu xovtooj xovtooj yog dab tsi?
Koj tuaj yeem ncav cuag Lub Chaw Haujlwm Ua Haujlwm ntawm (202) 551-4790. xov tooj hu xovtooj yog dab tsi? Ib tus xov tooj hu xovtooj cua (lossis xov xwm xov xwm) yog ib qho kev pabcuam uas pab cov neeg ua haujlwm thiab lwm tus tshaj tawm txog kev ua phem thiab tsis raug cai lossis tsis ncaj ncees hauv chaw ua haujlwm.
Cov fibers thiab sclereids nyob qhov twg hauv cov nroj tsuag?
Cov fibers no muaj nyob hauv lub cortex, thiab xylem thiab phloem ntawm cov nroj tsuag. Fibers muab cov neeg kho tshuab kev txhawb nqa. Hom sclereids yog Macro, osteo, Astro, Brachy sclereids. fiber ntau pom nyob rau hauv ib tsob nroj nyob qhov twg?
Puas yog cov nroj tsuag carnivorous yog cov tsim khoom lossis cov neeg siv khoom?
As producers, cov nroj tsuag tsim lub hauv paus ntawm yuav luag txhua cov khoom noj hauv ntiaj teb. Carnivorous nroj tsuag zoo li "tig rooj" thaum lawv ua raws li cov neeg siv khoom, gobbling kab, qav, thiab cov tsiaj me me. Puas yog Venus flytrap yog tus neeg siv khoom thiab tsim khoom?
Cov nroj tsuag sab hauv tsev hauv cov nroj tsuag?
Cov nroj tsuag zoo tshaj plaws hauv tsev muaj xws li hauv qab no: Aglaonema - Nws yog qhov txaus nyiam, zam lub teeb qis, thiab tsis loj hlob sai. Aspidistra - Koj yuav tsum tsis txhob muab dej ntau thiab nws yuav ua rau lub teeb qis. … Succulent - Nco ntsoov tias koj muab lub teeb ci rau lawv.
