Video: Gametophyte theem yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A gametophyte (/g?ˈmiːto?fa?t/) yog ib qho ntawm ob qhov sib hloov theem nyob rau hauv lub neej voj voog ntawm cov nroj tsuag thiab algae. Nws yog ib hom kab mob haploid multicellular uas tsim los ntawm haploid spore uas muaj ib pawg chromosomes. Cov gametophyte yog theem kev sib deev hauv lub neej voj voog ntawm cov nroj tsuag thiab algae.
Tsuas yog li ntawd, dab tsi tshwm sim thaum lub sij hawm gametophyte?
Hauv gametophyte theem, uas yog haploid (muaj ib txheej ntawm chromosomes), txiv neej thiab poj niam lub cev (gametangia) tsim thiab tsim qe thiab phev (gametes) los ntawm mitosis yooj yim rau kev sib deev. Thaum cov phab ntsa spore tawg nyob rau hauv qhov tsim nyog moist, lub fern gametophyte yog tsim.
Tsis tas li ntawd, Sporophyte theem yog dab tsi? ːro?ˌfa?t/) yog diploid multicellular theem nyob rau hauv lub neej voj voog ntawm cov nroj tsuag los yog alga. Nws tsim los ntawm cov zygote uas tsim thaum lub qe qe hlwb yog fertilized los ntawm cov phev haploid thiab txhua tus. sporophyte cell yog li ntawd muaj ob txheej ntawm chromosomes, ib txheej los ntawm txhua tus niam txiv.
Hais txog qhov no, piv txwv li gametophyte yog dab tsi?
Cov gametophytes Nyob rau hauv cov noob nroj tsuag, zoo li ntoo thuv thiab ntoo qhib, yog unisexual thiab microscopic. Lawv pom nyob rau hauv ib feem ntawm sporophyte thiab tso siab rau tag nrho cov sporophyte rau cov as-ham. Rau piv txwv , nyob rau hauv ib tsob ntoo ntoo, tus txiv neej gametophyte uas tsim cov phev yog pom nyob rau hauv ib lub paj noob hlis.
Ob hom Gametophytes yog dab tsi?
Cov spores no loj hlob mus rau hauv ob txawv hom gametophytes ; ib hom tsim cov phev thiab lwm yam tsim qe. Tus txiv neej gametophyte tsim cov kab mob hu ua antheridia (ua phev) thiab poj niam gametophyte tsim archegonia (tsim qe).
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