2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Meiosis tshwm sim hauv sporangia, nyob rau hauv qab ntawm nplooj sporophyte. Tom qab cov spores raug tso tawm lawv germinate, faib los ntawm mitosis thiab loj hlob mus rau hauv lub plawv zoo li gametophytes. … Lub embryo loj hlob mus rau sporophyte, tseem txuas nrog gametophyte.
Qhov twg ntawm Pteridophyte yog mitosis tshwm sim?
Nyob rau hauv lub neej haplontic, mitosis tshwm sim nyob rau hauv the haploid (n) theem uas yog Nyob rau hauv lub neej diplontic, lub diploid theem feem ntau yog multicellular, thiab meiosis tshwm sim multicellular, thiab cov diploid (2n) theem yog lub zygote uas undergoes meiosis.
YPteridophytes pom Sporic meiosis?
Pteridophytes qhia sporic meiosis, i.e. tsim cov spores los ntawm meiosis, uas germinates kom nce mus rau gametophytes. Spores yog tsim nyob rau hauv lub sporangia los ntawm meiosis nyob rau hauv spor niam hlwb.
Meiosis tshwm sim nyob qhov twg hauv gymnosperms?
Meiosis tshwm sim hauv paj paj (txiv neej) thiab hauv ovulate (poj niam) cones los yog strobili lossis sporangia ntawm cov nplooj tshwj xeebuas yog tsim rau ntawm sporophyte.
Puas meiosis tshwm sim hauv zygotes?
Gametes fuse hauv fertilization los tsim ib lub diploid zygote, tab sis zygote tam sim ntawd undergoes meiosis los tsim haploid spores. … Fertilization ua ib tug diploid zygote uas undergoes mitosis los tsim lub diploid version ntawm cov nroj tsuag, hu ua ib tug sporophyte, uas ces tsim haploidspores by meiosis.
Pom zoo:
Kev ua pa tshwm sim nyob rau hauv cov nroj tsuag nyob qhov twg?
Nyob hauv ib puag ncig ntuj, cov nroj tsuag tsim lawv cov zaub mov kom ciaj sia. Raws li nrog photosynthesis, cov nroj tsuag tau oxygen los ntawm huab cua los ntawm stomata. Kev ua pa tshwm sim nyob rau hauv mitochondria ntawm lub cellnyob rau hauv lub xub ntiag ntawm oxygen, uas yog hu ua "
Thaum twg pfizer tshwm sim tshwm sim?
Qee yam tshwm sim tshwm sim txoj cai tom qab koj txhaj tshuaj, zoo li mob me me hauv koj txhais caj npab. Lwm tus yuav siv sij hawm ntau teev los txhim kho. Nco ntsoov tias nrog ob koob tshuaj tiv thaiv zoo li Pfizer-BioNTech thiab Moderna, koj tuaj yeem pom muaj kev phiv ntau dua tom qab txhaj tshuaj thib ob.
Thaum twg qhov kev rov tshwm sim tshwm sim?
Thaum Replevin tuaj yeem thov Li no, qhov no yog qhov xwm txheej tshwm sim ntau tshaj plaws uas yuav tshwm sim thaum tus neeg siv khoom tsis raug them nyiaj qiv tsheb. Kev ua txhaum cai ntawm kev thaj yeeb nyab xeeb yog me ntsis luv luv. Nws tsis suav nrog kev txeeb tsheb yam tsis tau ceeb toom lossis kub xov tooj kom tsav tsheb mus.
Nyob rau hauv quantum mechanical tunneling ntawm cov khoom tshwm sim thaum twg?
Tunneling yog ib qho quantum mechanical phenomenon thaum ib cov particle tuaj yeem nkag mus los ntawm lub zog muaj zog uas muaj zog ntau dua li cov particle lub zog kinetic. Cov cuab yeej zoo kawg no ntawm cov khoom siv microscopic ua lub luag haujlwm tseem ceeb hauv kev piav qhia ntau yam tshwm sim hauv lub cev nrog rau cov xov tooj cua tsis zoo.
Nyob rau hauv lub cev ntawm tus txiv neej aqueduct ntawm sylvius tshwm sim nyob rau hauv?
Lub ventricles muaj plaub qhov khoob, cov kua dej puv hauv lub hlwb. … Nws txuas nrog lub paj hlwb aqueduct lossis aqueduct ntawm Sylvius hauv qhov nruab nrab ntawm lub hlwbrau plaub lub ventricle hauv pons thiab medulla. Lub aqueduct ntawm Sylvius nyob qhov twg?
