Txhua lub xovtooj tsuas yog cov hlwb basal ntawm sporophyte (2n) dhau los ntawm meiosis lossis txo qis thiab ua rau 8 txog 16 zoospores uas tom qab tso rau hauv dej. … Yog li ntawd, qhov hloov pauv tiam ntawm lub neej-kawg ntawm Ulvaqhia tias tsob ntoo asexual yog diploid.
Vim li cas peb thiaj hais tias Ulva muaj isomorphic alternation ntawm tiam?
Cov gametes me dua zoospores. … Qhov kev txo qis yuav tshwm sim thaum cov zoospores raug tsim. Cov haploid zoospores ua rau cov gametophytes. Ob hom nroj tsuag yog morphologically zoo tib yam thiab yog li ntawd ulva qhia ib qho isomorphic alternation ntawm tiam.
Ulva yug me nyuam li cas?
Ulva reproduces vegetatively, asexually thiab kev sib deev.… Asexual reproduction tshwm sim nrog kev pab ntawm quadriflagellate zoospores, tsim nyob rau hauv lub vegetative hlwb ntawm lub thallus Thaum xub thawj cov hlwb uas nyob ze ntawm lub margin ntawm lub thallus tsim zoospores, thiab ces cov nyob deb..
Vim li cas diploid Ulva tsim haploid zoospores?
Teb: Cov neeg laus diploid cog tsim haploid zoospores by 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-kawg 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.
