Nyob rau hauv angiosperms pollen yog tsim nyob rau hauv anthers ib feem ntawm?

Cov txheej txheem:

Nyob rau hauv angiosperms pollen yog tsim nyob rau hauv anthers ib feem ntawm?
Nyob rau hauv angiosperms pollen yog tsim nyob rau hauv anthers ib feem ntawm?
Anonim

Nyob rau hauv angiosperms, paj ntoos yog tsim los ntawm anthers ntawm the stamens hauv paj. Hauv gymnosperms, nws yog tsim nyob rau hauv microsporophylls ntawm microstrobili (txiv neej paj ntoos cones). Pollen muaj ib los yog ntau tshaj cov noob qoob loo thiab ib lub qe qe.

YPuas angiosperms puas muaj paj ntoos tsim hauv anthers?

Ob leeg gymnosperms (cov nroj tsuag muaj lub khob hliav qab) thiab angiosperms (flowering nroj tsuag) tsim paj paj ua ib feem ntawm kev sib deev. Nyob rau hauv gymnosperms pollen yog tsim nyob rau hauv microsporangiate cones (txiv neej cones los yog paj ntoos cones), thaum nyob rau hauv angiosperms paj ntoos yog tsim nyob rau hauv lub anthers(ib feem ntawm lub stamen nyob rau hauv lub paj).

Tus qauv twg yog tsim nyob rau hauv anthers?

Lub anther muaj plaub lub qauv saclike (microsporangia) uas tsim pollen rau pollination. Cov qauv me me, hu ua nectaries, feem ntau pom ntawm lub hauv paus ntawm stamens; lawv muab khoom plig khoom plig rau kab thiab noog pollinators. Tag nrho cov stamens ntawm ib lub paj tau sau ua ke hu ua androecium.

Puas paj ntoos tsim los ntawm anthers?

Stamen: Cov paj ntoos tsim ib feem ntawm lub paj, feem ntau nrog cov hlua khi uas txhawb nqa lub anther. Anther: Ib feem ntawm cov stamens uas paj ntoos raug tsim. … Stigma: Ib feem ntawm cov tshuaj tua kab uas pollen germinates.

Ntawm qhov twg ntawm angiosperm yog cov noob tsim?

Cov noob ntawm angiospermstsim nyob rau hauv zes qe menyuam ntawm pajthiab nyob ib puag ncig los ntawm cov txiv hmab txiv ntoo tiv thaiv. Gymnosperm noob feem ntau yog tsim nyob rau hauv unisexual cones, hu ua strobili, thiab cov nroj tsuag tsis muaj txiv hmab txiv ntoo thiab paj.

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