2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Paleobotanists, cov kws tshawb fawb uas kawm txog keeb kwm ntawm cov nroj tsuag, xav tias dicotyledons hloov zuj zus ua ntej, thiab cov kab mob monocots tau tawm ntawm 140 txog 150 lab xyoo dhau los los ntawm kev sib xyaw ntawm cov cotyledons lossis raws li ib txoj kab cais.
Puas monocots hloov zuj zus ua ntej dicots?
Tus monocots diverged tsim lawv cov txheeb ze dicot thaum ntxov ntawm kev hloov pauv ntawm cov paj ntoo. … Monocots muaj ib tug xov tooj ntawm qhov txawv nta uas yog synapomorphic rau pab pawg.
Puas monocots laus dua dicots?
Hauv qhov sib piv, Li-Tanimura txoj kev muab kev kwv yees ua raws li kev paub txog kev hloov pauv ntawm cov noob nroj tsuag kab thiab nrog cov ntaub ntawv fossil paub. … Cov kev kwv yees no qhia tias ob qho tib si monocot–dicot divergence thiab cov tub ntxhais eudicot lub hnub nyoog laus dua lawv cov ntaub ntawv fossil.
Puas monocots hloov zuj zus dua li dicots?
Cov dicots tau xav tias yog pawg qub ntawm cov nroj tsuag uas cov monocots tau hloov zuj zus. Yog li, monocots yog xav tias yuav hloov zuj zus tom qab dicots. Qhov yooj yim lub cev ntawm cov monocots yog xav tias yuav siv tau lub hnub ci zog thiab loj hlob sai.
Yuav ua li cas yog primitive dicot lossis monocot?
Tus herbaceous monocots tau suav tias yog qhov qub tshaj li cov ntoo dicotyledons los ntawm lawv. … Hauv dicots, monocolpate pollen muaj nyob hauv Magnoliales, qee qhov Laurales, Nymphaeales(tsis suav Nelumbo), feem ntau ntawm Piperales thiab hauv genus Saruma ntawm Aristolochiaceae.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Puas yog jurassic ntiaj teb hloov pauv hloov pauv hloov pauv?
Qee zaum, paub meej, koj yuav tau rov qab mus rau lub sijhawm dhau los - txuag manually, thiab feem ntau, raws li game's autosave yog… tsis zam txim - tab sis feem ntau ntawm cov lub sijhawm koj tuaj yeem khaws cov khoom thiab khaws cia nrog.
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
