Nyob rau hauv seedless vascular nroj tsuag xws li ferns, lub sporophyte tso tawm spores ntawm cov hauv qab ntawm nplooj. Cov spores loj hlob mus rau hauv me me, cais gametophytes, los ntawm cov tiam tom ntej ntawm cov nroj tsuag sporophyte loj hlob.
Qhov twg yog spores tsim nyob rau hauv seedless vascular nroj tsuag?
Reproduction in Seedless Vascular Plants
The fern's sporangia, qhov twg spores raug tsim, feem ntau nyob rau hauv qab ntawm fronds (Daim duab hauv qab no).
Vim li cas spores tseem ceeb rau cov nroj tsuag tsis muaj noob?
Hloov cov noob, cov noob tsis muaj vascular nroj tsuag rov ua dua nrog cov spores. Spores yog qhov hnyav heev, uas pab kom lawv tawg sai sai hauv cua Qhov no tso cai rau cov nroj tsuag zoo li ferns kis tau yooj yim mus rau thaj chaw tshiab. Seedless vascular nroj tsuag nyob ntawm dej thaum lub sij hawm fertilization, vim cov phev yuav tsum ua luam dej mus rau lub qe.
Puas cov nroj tsuag vascular puas muaj spores?
Spore producers: Vascular nroj tsuag tuaj yeem tsim dua los ntawm spores xwb raws li ntau cov nroj tsuag nonvascular ua. Txawm li cas los xij, lawv cov vascularity ua rau lawv pom qhov sib txawv ntawm cov nroj tsuag uas tsim cov primitive spore uas tsis muaj cov ntaub so ntswg. Piv txwv ntawm vascular spores tsim muaj xws li ferns, horsetails thiab qws mosses.
Puas noob tsis muaj kab mob cov nroj tsuag muaj spores?
Seedless non-vascular nroj tsuag tsuas yog ib hom spore thiab hu ua homosporous. Cov theem gametophyte yog qhov tseem ceeb hauv cov nroj tsuag no. Tom qab germinating los ntawm ib tug spores, qhov tshwm sim gametophyte tsim ob leeg txiv neej thiab poj niam gametangia, feem ntau ntawm tib neeg.
