Ib cotyledon yog ib feem tseem ceeb ntawm lub embryo nyob rau hauv cov noob ntawm cov nroj tsuag. Thaum germination, lub cotyledon feem ntau dhau los ua embryonic thawj nplooj ntawm ib tug yub. Tus naj npawb ntawm cov cotyledons tam sim no yog ib yam ntxwv siv los ntawm botanists los faib cov paj ntoo (angiosperms).
cotyledon nyob qhov twg?
Cotyledons nyob ntawm lub fetal chorion (sab nraum txheej ntawm cov placenta) hu ua cotyledons thiab ua haujlwm ua tus menyuam hauv plab ntawm placentome.
cotyledon yog dab tsi thiab koj yuav pom qhov twg?
Cotyledon, noob nplooj nyob rau hauv lub embryo ntawm ib tug noob. Cotyledons pab muab cov khoom noj uas cog embryo yuav tsum tau germinate thiab tsim los ua ib tug photosynthetic kab mob thiab tej zaum lawv tus kheej yog ib qhov chaw ntawm kev noj haus reserves los yog tej zaum yuav pab lub embryo nyob rau hauv metabolizing khoom noj khoom haus khaws cia nyob rau lwm qhov hauv cov noob.
Cov nroj tsuag twg muaj cotyledon?
hom kab nrog ib cotyledon hu ua monocotyledonous ("monocots"). Cov nroj tsuag nrog ob nplooj embryonic hu ua dicotyledonous ("dicots"). Nyob rau hauv cov ntaub ntawv ntawm dicot seedlings uas nws cotyledons yog photosynthetic, lub cotyledons yog functionally zoo li nplooj.
Puas cotyledon khaws cia hauv zaub mov?
Ob qhov loj ntawm cov noob hu ua cotyledons. Cotyledons yog khaws khoom noj uas cov nroj tsuag hluas yuav siv thaum nws loj hlob. Monocots yog cov noob uas tsuas muajib cotyledon, xws li cov noob pob kws.
