2024 Tus sau: Luke Adderiy | [email protected]. Kawg hloov kho: 2024-01-10 19:34
Teb: Cov neeg laus diploid cog tsim haploid zoospores los ntawm meiosis, cov no nyob thiab loj hlob mus rau cov txiv neej thiab poj niam cov nroj tsuag zoo ib yam li cov nroj tsuag diploid. Thaum cov nroj tsuag haploid tso tawm gametes lawv koom ua ke los tsim cov zygote uas germinates, thiab loj hlob los tsim cov nroj tsuag diploid.
Cov qauv twg hauv lub neej voj voog ntawm Ulva yog haploid?
Nyob rau hauv lub neej haplodiplontic, gametes tsis yog qhov tshwm sim ntawm kev faib meiotic. Diploid sporophyte hlwb raug meiosis los tsim haploid spores. Txhua lub spores mus los ntawm kev sib faib mitotic kom tau txais ntau lub cellular, haploid gametophyte.
Ulva yug me nyuam li cas?
Reproduction in Ulva
Ulva feem ntau multiply bymeans of fragments that is accidently produce from a thallus Kev cog qoob loo kuj tshwm sim los ntawm kev loj hlob ntawm perennial holdfast. Asexual reproduction: Asexual reproduction tshwm sim los ntawm quadriflagellate zoospores.
Ulva ua li cas hloov pauv ntau tiam?
Ulva muaj kev hloov pauv ntawm ntau tiam neeg. Biflagellate isogametes yog tsim los ntawm qee lub hlwb ntawm haploid, gametangial cog. … Cov no raug tso tawm, ua luam dej ib ncig ntawm ib lub sij hawm, khom thiab germinate los ua lub haploid gametangial thallus.
Ulva yog Isogamy?
Ntau hom yog isogamous, tab sis ob peb yog aniogamous. Qhov xwm txheej ntawm kev hloov ntawm ntau tiam neeg hauv Ulva yog isomorphic (Fig. 44).
Pom zoo:
Puas yog sporophyte ntawm marchantia haploid lossis diploid?
Marchantia tau hloov pauv ntawm ntau tiam neeg ntawm cov nroj tsuag hauv av. Yog li, dhau los ntawm nws lub neej voj voog, ntau tiam neeg haploid gametophyte hloov nrog multicellular diploid sporophyte tiam . Marantia sporophyte yog dab tsi?
Zoospores tsim li cas?
YIb tug zoospore yog motile asexual spore uas siv lub flagellum rau locomotion. Kuj hu ua swarm spore, cov spores no yog tsim los ntawm qee protists, kab mob, thiab fungi los propagate lawv tus kheej . Zoospores ua li cas? …dawb-ua luam dej kis kab mob hu ua zoospores.
Puas yog microsporangium haploid lossis diploid?
Cov microsporangia (ntau ntau ntawm microsporangium) yog cov hnab paj ntoos uas cov microspores loj hlob mus rau paj paj nplej. Raws li ib tug spore, lub microspore yog haploid, tab sis nws yog muab los ntawm ib tug diploid cell . YPuas yog Megasporangium haploid lossis diploid?
Puas mitosis tshwm sim hauv cov hlwb haploid thiab diploid?
Ob lub hlwb haploid thiab diploid tuaj yeem raug mitosis. Thaum lub cell haploid raug mitosis, nws tsim ob lub noob caj noob ces zoo tib yam haploid ntxhais hlwb; Thaum ib lub cell diploid raug mitosis, nws tsim ob lub noob caj noob ces zoo tib yam diploid ntxhais hlwb .
Puas yog fertilized qe haploid lossis diploid?
Nyob rau hauv tib neeg fertilization, ib tug tso tawm ovum (ib tug haploid theem nrab oocyte nrog replicate chromosome luam) thiab ib tug haploid phev cell (txiv neej gamete)-combine los ua ib tug tib 2n diploid cell hu ua zygote . YPuas yog fertilization yog diploid?