Qhov sib txawv tseem ceeb ntawm spores thiab cov noob yog tias spore yog ib qho qauv ntawm lub tshuab microscopic thaum cov noob yog cov qauv macroscopic multicellular.
Spore thiab noob yog ob txoj kev ua me nyuam. Ob leeg spore thiab noob yuav tsum tau germinate thiaj li tsim tau ib tug tshiab kab mob. Thaum sib piv cov noob thiab spores, spores yog microscopic thaum cov noob yog macroscopic. Ntxiv mus, noob yog multicellular thaum spores yog unicellular. Yog li, muaj qhov sib txawv tseem ceeb ntawm spore thiab noob nyob rau hauv cov nqe lus ntawm ob qho tib si qauv thiab kev ua haujlwm.
Dab tsi yog Spore?
Spore yog ib qho qauv ntawm cov kab mob me me uas tuaj yeem txhim kho rau tus neeg tshiab. Nyob ntawm ntau hom spores, cov nroj tsuag tuaj yeem ua homosporous lossis heterosporous. Homospory yog hais txog cov nroj tsuag uas tsuas muaj ib hom spores xwb, hos heterosporous hais txog cov nroj tsuag uas muaj ob hom spores: txiv neej spores (microspores) thiab poj niam spores (megaspores).
Daim duab 01: Spore
Nyob rau hauv angiosperms, microspores yog paj ntoos nplej thiab lawv pom nyob rau hauv cov paj ntoos los yog microsporangium. Microspores yog me me heev, cov txheej txheem feeb. Lawv yuav luag zoo li hmoov av. Txhua microspore muaj ib lub cell thiab ob lub tsho loj. Lub tsho sab nrauv yog lub extine, thiab sab hauv yog lub intine. Extine yog ib txheej tawv, cutinized txheej. Nws feem ntau muaj spinous outgrowths. Qee lub sij hawm nws tuaj yeem ua tau zoo, thiab. Lub intine yog du, thiab nws yog heev nyias. Nws yog tsuas yog ua los ntawm cellulose. Lub extine muaj ib lossis ntau qhov chaw nyias uas hu ua cov kab mob pores los ntawm qhov intine loj hlob tawm los ua lub paj paj noob hlis. Lub raj paj ntoos elongates los ntawm cov ntaub so ntswg gynoecium nqa ob tug txiv neej gametes hauv nws. Hauv cov nroj tsuag paj, lub megaspore niam cell faib meiotically, tsim ib tetrad ntawm plaub megaspores nyob rau hauv uas lub Upper peb megaspores degenerate.
noob yog dab tsi?
Tom qab fertilization, lub ovule loj hlob mus rau hauv cov noob. Ob lub integuments ntawm lub ovule dhau los ua ob lub tsho tiv no: lub tsho loj (testa), thiab lub tsho loj (tegmen). Qee cov noob tsuas muaj ib lub tsho loj xwb.
Daim duab 02: Noob
Txiv kab ntxwv los ntawm lub funicle. Lub nucellus feem ntau yog siv tag nrho, tab sis hauv qee cov noob, nws yuav nyob twj ywm li nyias txheej. Lub qe qe, tom qab fertilization, ua rau lub embryo, thiab synergid thiab antipodal hlwb tau tag nrho disorganized tom qab fertilization.
Dab tsi zoo sib xws ntawm Spore thiab noob?
- Nroj tsuag tsim tau ob qho tib si spores thiab noob.
- Ob leeg tuaj yeem txhim kho mus rau ib tus neeg tshiab.
Qhov txawv ntawm Spore thiab noob yog dab tsi?
Spore thiab noob yog ob txoj kev ua me nyuam uas tuaj yeem txhim kho mus rau ib tus neeg tshiab. Spore yog ib tug unicellular microscopic qauv thaum noob yog ib tug fertilized zes qe menyuam uas yog macroscopic. Yog li ntawd, qhov no yog qhov sib txawv tseem ceeb ntawm spore thiab noob. Tsis tas li ntawd, spores yog haploid thaum cov noob yog diploid.
Ntxiv mus, qhov sib txawv ntxiv ntawm cov kab mob thiab cov noob yog tias cov spores tsis muaj embryos sab hauv, hos cov noob muaj cov embryo hauv. Tsis tas li ntawd, cov microspores yog cov plua plav zoo li cov khoom me me thaum cov noob muaj qhov sib piv loj dua. Yog li, qhov loj me kuj ua rau muaj qhov sib txawv ntawm cov kab thiab cov noob.
Summary – Spore vs Noob
Spores yog cov qe menyuam yaus uas tuaj yeem txhim kho mus rau cov neeg tshiab yam tsis muaj kev sib txuas ntawm lwm lub xov tooj ntawm tes. Ntxiv mus, lawv yog microscopic unicellular qauv. Nyob rau hauv sib piv, noob yog fertilized ovule ntawm gymnosperms thiab angiosperms. Hauv angiosperms, cov noob muaj nyob hauv cov txiv hmab txiv ntoo. Tsis tas li ntawd, gymnosperms tsim cov noob liab qab. Thaum sib piv qhov ntau thiab tsawg ntawm spores thiab noob, noob loj thaum spores yog microscopic. Tsis tas li ntawd, spores tsis muaj cov khoom noj uas khaws cia, thaum cov noob muaj cov zaub mov khaws cia. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm spore thiab noob.
