2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Vim muaj ob lub thecae hauv ib lub lobe, ces cov anthers ntawm angiosperms hu ua dithecous. Microsporangia yog cov qauv uas feem ntau yog lub luag haujlwm rau kev tsim thiab tso tawm paj paj noob qoob. Thecae ua raws li microsporangium.
Vim li cas Bilobed anther Dithecous thiab Tetrasporangiate?
Nws yog oblong thiab knoblike thiab raug xa mus rau raws li ib feem ntawm cov stamens. Nws yog dithecous vim tias txhua qhov anther lobe muaj ob chav los yog theca. … Cov hnab paj ntoos ntev thiab cylindrical los yog microsporangia muaj nyob rau hauv ob chav ntawm anther lobe. Yog li ntawd, peb tuaj yeem hais tias bilobed anther yog tetrasporangiate.
Vim li cas anther hu ua microsporangium?
txhawm rau txhais cov microsporogenesis, nws tsuas yogtxheej txheem los ntawm cov paj ntoos niam lub hlwb ua rau microspores. Nyob rau hauv nruab nrab ntawm txhua microsporangium nyob rau hauv cov tub ntxhais hluas anther ntawm ib tsob nroj, yog ib tug loj ntawm sporogenous ntaub so ntswg. … Yog li txhua lub xov tooj hu ua microspore lossis pollen niam cell.
Dab tsi hu ua Dithecous?
Lub anther ntawm androecium ntawm angiospermic paj yog bilobed thiab txhua lobe muab faib ua ob feem los yog theca. Yog li, anther ntawm angiospermic paj hu ua dithecous.
Bilobed thiab Dithecous yog dab tsi?
anther yog piav los ntawm cov lus sib txawv. bilobed anther txhais tau hais tias lub anther muaj 2 lobes. dithecous anther txhais tau tias txhua lobe ntawm anthermuaj ob lub theca thiab yog li hu ua dithecous. tetrasporangiate txhais tau hais tias lub anther muaj 4 sporangia lossis peb tuaj yeem hais tias microsporangium.
Pom zoo:
Puas pom qhov tseem ceeb yog vim li cas lossis vim li cas ho tsis?
Kev sib txuas lus pom kev pab cov neeg tuaj saib nkag siab cov ntaub ntawv. Nws ua rau kom nkag siab txog cov ntsiab lus. Hom duab ob sab uas pab kev sib txuas lus muaj xws li kos duab, kos duab kos duab, animation, kos npe, typography, graphic designs, thiab lwm yam.
Puas yog jasmine muaj anthers?
Nyob rau hauv jasmine, qee me thiab/lossis npliag paj ntoos nplej ib txwm tshwm sim hauv anthers (Deng li al., 2014, Deng li al., 2016). Tus yam ntxwv ntawm jasmine paj yog dab tsi? Txhua lub paj muaj ntawm plaub thiab cuaj kab, plaub lub qe thiab ob locules.
Nyob rau hauv angiosperms pollen yog tsim nyob rau hauv anthers ib feem ntawm?
Nyob rau hauv angiosperms, paj ntoos yog tsim los ntawm anthers ntawm the stamens hauv paj. Hauv gymnosperms, nws yog tsim nyob rau hauv microsporophylls ntawm microstrobili (txiv neej paj ntoos cones). Pollen muaj ib los yog ntau tshaj cov noob qoob loo thiab ib lub qe qe.
Leej twg ua anthers tsim?
Tus txiv neej ua me nyuam ib feem ntawm lub paj hu ua stamen. Nws yog tsim los ntawm ib tug ntev raj, hu ua ib tug filament, thiab muaj ib tug pollen-tsim qauv ntawm qhov kawg. Cov qauv no oval-puab hu ua anther. Nws yog ib qho tseem ceeb nyob rau hauv kev loj hlob ntawm flowering nroj tsuag, raws li nws tsim tus txiv neej gametophyte, hu ua paj ntoos.
Lub xovtooj twg yog triploid hauv cov nroj tsuag angiosperm?
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.
