Video: Puas yog horsetails muaj Archegonia?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txawm li cas los xij, club mosses, horsetails , thiab ferns muaj ib theem tseem ceeb sporophyte thiab txo qis gametophyte theem. Cov gametophytes inconspicuous no tsim cov phev-tsim antheridia thiab qe-cov kabmob archegonia - Qee zaum ntawm tib tsob nroj, thiab hauv lwm hom ntawm ob hom nroj tsuag sib txawv.
Ua kom pom qhov no, cov noob nroj tsuag puas muaj Archegonia?
Noob nroj tsuag yog tag nrho heterosporous. Nws yog ib qho yooj yim kom sib txawv cov poj niam loj megaspore los ntawm cov txiv neej me me microspore. Cov phev ntawm noob nroj tsuag muaj tsis muaj flagella. Lawv tsis muaj antheridia, thiab tsuas yog qee qhov tseem muaj ib archegonia.
Tsis tas li ntawd, cov horsetails puas muaj cov hauv paus hniav? Zoo li lwm cov nroj tsuag vascular, horsetails thiab club mosses muaj tseeb nplooj, stems, thiab keeb kwm , txawm hais tias cov qauv no yooj yim dua li lawv nyob hauv cov noob nroj tsuag thiab paj ntoo. Nyob rau hauv seedless vascular nroj tsuag, txhua nplooj me me muaj ib leeg xwb. Lub stems, nyob rau hauv lem, tsis muaj ntoo, los yog theem nrab kev loj hlob.
Kuj nug, yog Archegonia haploid?
Cov txiv neej thiab poj niam cev xeeb tub, antheridia thiab cov archegonia Raws li, yog tsim los ntawm gametophytic nroj tsuag. Haploid Cov phev raug tso tawm ntawm antheridia thiab thaum a haploid phev mus txog a haploid vaj in archegonium lub qe yog fertilized los tsim ib lub cell diploid.
Puas horsetails tsim noob?
Horsetail tsis muaj paj thiab tsis muaj tsim noob . Nws reproduces ntawm spores uas yog ua nyob rau hauv lub sporangium (cone zoo li lub cev), nyob rau sab saum toj ntawm cov nroj tsuag. Horsetail yog cov nroj tsuag perennial tab sis txhua theem ntawm nws lub neej voj voog kav ntev.
Pom zoo:
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