Selaginella puas yog Sporophyte lossis Gametophyte?
Selaginella puas yog Sporophyte lossis Gametophyte?

Video: Selaginella puas yog Sporophyte lossis Gametophyte?

Video: Selaginella puas yog Sporophyte lossis Gametophyte?
Video: Селагинелла. Уход в домашних условиях. Флорариум, цветочная композиция. 2024, Kaum ib hlis
Anonim

Raws li nyob rau hauv ferns, spore ntawm Selaginella loj ua a gametophyte . Cov gametophyte ua los ntawm cov loj spore nyob rau hauv lub megasporangium tsim qe hlwb. Cov spores me me hauv microsporangium loj hlob mus rau hauv a gametophyte uas tsim cov phev hlwb.

Yog li ntawd, selaginella yug me nyuam li cas?

Kev tsim tawm ntawm selaginella Spike mosses yug me nyuam nrog spores. Lawv muaj cov txiv neej thiab poj niam sib txawv spores hu ua microspores thiab megaspores, feem. Spore yog ua rau ntawm nplooj nyob rau hauv enclosures hu ua sporangia. Cov spores ntawm Selaginella hom yog ob leeg pollinated thiab dispersed los ntawm cua.

Kuj Paub, Ligule hauv selaginella yog dab tsi? Lub ligule zoo nkaus li yog ib qho txuas ntxiv ntawm nplooj sheath thiab encircles los yog clasps lub qia raws li qhov ua nplooj sheath. Peb hom ntawm ligules yog: membranous, fringe ntawm cov plaub hau (ciliate), thiab tsis tuaj los yog tsis muaj.

Yog li ntawd, Rhizophore selaginella yog dab tsi?

feature ntawm Selaginella yog cov rhizophore , ib tug proplike qauv uas originates ntawm ib tug taw tes ntawm branching thiab uas forks dichotomously tom qab ua kev sib cuag nrog cov av los yog ib tug nyuaj nto. Rhizophores Nws yooj yim pom nyob rau hauv hom clambering.

Hom stele twg muaj nyob hauv Selaginella?

Polystele: Feem ntau nyob rau hauv ib tug protostele, qia muaj ib zaug stele nyob rau hauv qhov chaw. Tab sis nyob rau hauv Selaginella , lub qia axis muaj ob peb steles nyob rau hauv parallel kev npaj (di-stelic los yog polystelic). Txhua stele yog ib tug protostele nrog xylem core surrounded los ntawm phloem nrog pericycle thiab endodermis.

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