Yuav ua li cas diploid ulva tsim haploid zoospores thiab vim li cas?
Yuav ua li cas diploid ulva tsim haploid zoospores thiab vim li cas?

Video: Yuav ua li cas diploid ulva tsim haploid zoospores thiab vim li cas?

Video: Yuav ua li cas diploid ulva tsim haploid zoospores thiab vim li cas?
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Anonim

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).

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