Cov chav kawm ntawm Spermatophyta yog Ginkgoopsida, Cycadopsida Cycadopsida Cycads yog gymnosperms (liab seeded), txhais tau tias lawv cov noob tsis muaj noob qhib rau saum huab cua kom ncaj qha fertilized los ntawm pollination, raws li contrasted. nrog angiosperms, uas tau kaw cov noob nrog ntau txoj kev fertilization. Cycads muaj tshwj xeeb pollinators, feem ntau yog ib hom kab kab. https://en.wikipedia.org › wiki › Cycad
Cycad - Wikipedia
Pinopsida, Gnetopsida, thiab Angiospermae. Ginkgoopsida tsuas yog ib hom; Ginkgo lossis maidenhair ntoo (Ginkgo biloba). Cov nroj tsuag no tau ploj mus ntev hauv cov qus tab sis tau cog rau hauv cov tuam tsev hauv Suav teb ua tsob ntoo zoo nkauj.
Ob hom Spermatophyta yog dab tsi?
Nyob hauv kab lus no peb yuav tham txog ob pawg tseem ceeb ntawm kev faib hauv Spermatophyta:- 1. Gymnosperms 2. Angiosperms.
Peb hom angiosperms yog dab tsi?
Nyob rau hauv angiosperms yog peb pawg loj: basal angiosperms, monocots, thiab dicots.
Dab tsi yog peb qhov kev faib tawm ntawm angiosperms raws li lawv lub caij loj hlob?
Paj paj tuaj nyob rau hauv peb hom: txhua xyoo loj hlob hauv ib lub caij lossis xyoo thiab tuag tom qab lawv paj. Lawv tsuas paj ib zaug xwb. biennials loj hlob rau ob lub caij, thiab paj thiab tuag rau xyoo thib ob.
Dab tsi yog 2 qhov kev faib nyob rau hauv angiosperms?
Paj paj tau muab faib ua ob pawg, cov monocots thiab eudicots, raws li tus naj npawb ntawm cotyledons hauv cov yub. Basal angiosperms belongs rau ib tug neeg laus tshaj li monocots thiab eudicots.
