Strobilus yog cov kabmob spore yog li nws yog sporophyte tiam. Nws yog tam sim no nyob rau hauv ntau hom ntawm terrestrial nroj tsuag thiab nws muaj sporangia. Nws kuj yog feem ntau hu ua cone. Tus txiv neej strobilus muaj microsporophylls uas dais microsporangia thiab tsim microspores los ntawm meiosis.
Yog Strobilus yog gametophyte?
Txhua lub microspore hauv microsporangium txhim kho rau hauv ib tus neeg, haploid txiv neej gametophyte uas me ntsis ntau dua li lub thawv rau ob phev.
Koj qhia li cas yog tsob nroj yog sporophyte lossis gametophyte?
Gametophytes yog haploid (n) thiab muaj ib pawg chromosomes, whereas Sporophytes yog diploid (2n), piv txwv li, lawv muaj ob pawg chromosomes.
Puas yog Strobilus haploid lossis diploid?
Lub neej voj voog ntawm P. pungens ua raws li lub neej ib txwm muaj ntawm txhua tus coniferophyta uas tau tswj hwm los ntawm sporophyte tiam (tus ntoo). Thaum tsob ntoo sporophyte paub tab, nws tsim diploid (2n) txiv neej thiab poj niam cones lossis strobili raws li tau hais ua ntej. Cov hlwb diploid no raug meiosis los ua haploid gametophytes.
Puas yog conifers gametophyte lossis sporophyte dominant?
Conifers yog ntoo ntoo thiab tsob ntoo nrog rab koob zoo li nplooj. Conifers muaj cones (li no lawv lub npe). Cones yog cov qauv kev ua me nyuam ntawm cov conifers: Cones yog cov ntaub so ntswg diploid tsim los ntawm dominant sporophyte theem. Haploid gametophyte theem tsim thiab tsim gametes hauv lub khob hliav qab.
