2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv angiosperms, paj ntoos yog tsim los ntawm anthers ntawm the stamens hauv paj. Hauv gymnosperms, nws yog tsim nyob rau hauv microsporophylls ntawm microstrobili (txiv neej paj ntoos cones). Pollen muaj ib los yog ntau tshaj cov noob qoob loo thiab ib lub qe qe.
YPuas angiosperms puas muaj paj ntoos tsim hauv anthers?
Ob leeg gymnosperms (cov nroj tsuag muaj lub khob hliav qab) thiab angiosperms (flowering nroj tsuag) tsim paj paj ua ib feem ntawm kev sib deev. Nyob rau hauv gymnosperms pollen yog tsim nyob rau hauv microsporangiate cones (txiv neej cones los yog paj ntoos cones), thaum nyob rau hauv angiosperms paj ntoos yog tsim nyob rau hauv lub anthers(ib feem ntawm lub stamen nyob rau hauv lub paj).
Tus qauv twg yog tsim nyob rau hauv anthers?
Lub anther muaj plaub lub qauv saclike (microsporangia) uas tsim pollen rau pollination. Cov qauv me me, hu ua nectaries, feem ntau pom ntawm lub hauv paus ntawm stamens; lawv muab khoom plig khoom plig rau kab thiab noog pollinators. Tag nrho cov stamens ntawm ib lub paj tau sau ua ke hu ua androecium.
Puas paj ntoos tsim los ntawm anthers?
Stamen: Cov paj ntoos tsim ib feem ntawm lub paj, feem ntau nrog cov hlua khi uas txhawb nqa lub anther. Anther: Ib feem ntawm cov stamens uas paj ntoos raug tsim. … Stigma: Ib feem ntawm cov tshuaj tua kab uas pollen germinates.
Ntawm qhov twg ntawm angiosperm yog cov noob tsim?
Cov noob ntawm angiospermstsim nyob rau hauv zes qe menyuam ntawm pajthiab nyob ib puag ncig los ntawm cov txiv hmab txiv ntoo tiv thaiv. Gymnosperm noob feem ntau yog tsim nyob rau hauv unisexual cones, hu ua strobili, thiab cov nroj tsuag tsis muaj txiv hmab txiv ntoo thiab paj.
Pom zoo:
Nyob rau hauv cov qog nqaij hlav ntawm lub plab pepsin yog tsim los ntawm?
Cov qog no yog cov tubules nqaim uas muaj peb hom cell loj: zymogenic, parietal, thiab mucous caj dab. Nyob rau hauv lub hauv paus ntawm lub caj pas yog cov zymogenic (chief) hlwb, uas xav tias tsim cov enzymes pepsin thiab rennin. Cov qog dab tsi tsim pepsin?
Puas yog ib feem ntawm sab laug ventricular ejection feem?
Nco lub siab. Ib txwm tshuav ventricular ejection feem (LVEF) yog li ntawm 55% txog 70%. Ib qho LVEF ntawm 65%, piv txwv li txhais tau hais tias 65% ntawm tag nrho cov ntshav nyob rau hauv sab laug ventricle yog nqus tawm nrog txhua lub plawv dhia.
Ntawm dab tsi feem ntau zaus ntawm conical pendulum nyob ntawm?
Nws ncaj qha proportional rau lub hauv paus square ntawm qhov ntevthiab inversely proportional rau square cag ntawm acceleration vim lub ntiajteb txawj nqus. Ntawm dab tsi yog qhov zaus ntawm oscillation ntawm pendulum B nyob ntawm? Yog li ntuj zaus ntawm qhov thib ob pendulum nyob ntawm lub hauv paus square ntawm qhov hloov pauv ntawm nws qhov ntev.
Feem ntau loyalist txhawb rau teb chaws Aas Kiv yog qaug zog tshaj nyob rau hauv?
feem ntau nws muaj zog tshaj plaws hauv Carolinas thiab Georgia thiab tsis muaj zog tshaj plaws hauv New England. Cov neeg ntseeg siab tau txhawb nqa Tebchaws Askiv rau ntau qhov laj thawj. Kev txhawb siab rau Tebchaws Askiv qhov tsis muaj zog nyob qhov twg?
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?
