Dab tsi ntawm spores yog tsim nyob rau hauv cov nroj tsuag fern?
Dab tsi ntawm spores yog tsim nyob rau hauv cov nroj tsuag fern?

Video: Dab tsi ntawm spores yog tsim nyob rau hauv cov nroj tsuag fern?

Video: Dab tsi ntawm spores yog tsim nyob rau hauv cov nroj tsuag fern?
Video: yog hmoov dab tsi. Zoo Xyooj (cover) 2024, Kaum ib hlis
Anonim

Hauv ferns, lub multicellular sporophyte feem ntau lees paub tias yog tsob ntoo fern. Hauv qab ntawm fronds yog sporangia. Nyob rau hauv lub sporangia yog spores tsim cov hlwb hu ua sporogenous hlwb. Cov hlwb no tau txais meiosis los tsim cov kab mob haploid.

Tsis tas li ntawd, cov nroj tsuag spores yog dab tsi?

Spore , lub cev xeeb tub muaj peev xwm txhim kho mus rau ib tus neeg tshiab yam tsis muaj kev sib txuas nrog lwm lub xov tooj ntawm tes. Spores yog cov neeg sawv cev ntawm kev yug me nyuam asexual, qhov gametes yog cov neeg sawv cev ntawm kev sib deev. Spores yog tsim los ntawm cov kab mob, fungi, algae, thiab nroj tsuag.

Ib sab saum toj no, cov nroj tsuag fern yog dab tsi? Fern , ib qho ntawm ob peb nonflowering vascular nroj tsuag uas muaj tseeb cov hauv paus hniav, stems, thiab complex nplooj thiab uas reproduce los ntawm spores. Cov ferns ua ib tug ancient faib ntawm vascular nroj tsuag , ib txhia ntawm lawv laus li lub sij hawm Carboniferous (pib txog 358.9 lab xyoo dhau los) thiab tej zaum laus dua.

Raws li txoj cai, yog cov spores tsim los ntawm fern Sporophyte?

Fern Sporophyte . Sporophytes tuaj yeem tsim tawm los ntawm kev cog qoob loo ntawm lawv cov rhizomes lossis los ntawm spore tsim los ntawm meiosis. Spores , es tsis yog gametes, yog unicellular, haploid khoom ntawm meiosis hauv fern nroj tsuag. Spores Nyob rau hauv lem undergo mitotic cell divisions rau tsim tawm multicellular, haploid gametophyte

Ib qho piv txwv ntawm tus kab mob yog dab tsi?

Lub ntsiab txhais ntawm a spore yog ib yam kab mob me me los yog ib lub xov tooj ntawm tes uas muaj peev xwm loj hlob mus rau hauv cov kab mob tshiab nrog rau cov xwm txheej zoo. Ib piv txwv ntawm ib tug spore yog paj noob. YourDictionary txhais thiab siv piv txwv.

Pom zoo: