cotyledon, noob nplooj nyob rau hauv lub embryo ntawm ib tug noob Cotyledons pab muab khoom noj khoom haus cov nroj tsuag 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 khoom noj khoom haus reserves los yog tej zaum yuav pab lub embryo nyob rau hauv metabolizing khoom noj khoom haus khaws cia rau lwm qhov hauv cov noob.
Puas yog cov noob cotyledons?
Cotyledons yog thawj nplooj uas tsim los ntawm cov nroj tsuag. Cotyledons yog tsis suav tias yog nplooj tiag thiab qee zaum hu ua "cov nplooj nplooj," vim tias lawv yog ib feem ntawm cov noob lossis embryo ntawm cov nroj tsuag.
Cov cotyledon muaj dab tsi?
Cov cotyledons muaj (los yog nyob rau hauv cov ntaub ntawv ntawm gymnosperms thiab monocotyledons, muaj kev nkag tau mus rau) cov khoom noj khaws cia ntawm cov noob Raws li cov reserves no tau siv lawm, cov cotyledons yuav tig ntsuab thiab pib photosynthesis, los yog tej zaum yuav wither raws li thawj cov nplooj tiag tiag noj cov zaub mov ntau lawm rau cov yub.
Puas muaj pes tsawg cotyledons hauv ib lub noob?
Cov npe lossis cov pab pawg no yog muab los ntawm cov cotyledons lossis cov nplooj nplooj uas cov embryonic seedling muaj nyob rau hauv nws cov noob. Ib tug monocot, uas yog lub npe luv rau monocotyledon, yuav tsuas muaj ib cotyledon thiab ib tug dicot, los yog dicotyledon, yuav muaj ob cotyledons.
Vim li cas cotyledons hu ua noob nplooj?
Textbook solution. Cotyledons yog hu ua noob nplooj vim lawv ua raws li cov noob nplooj thaum lub sij hawm germination txheej txheemQhov no muaj tseeb nyob rau hauv lub siab hais tias, ib yam li cov nroj tsuag nplooj muab zaub mov rau cov nroj tsuag, yog li ua cotyledons muab. zaub mov rau cov nroj tsuag germinating.
