Vim li cas heterospory thiaj suav tias yog?

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Vim li cas heterospory thiaj suav tias yog?
Vim li cas heterospory thiaj suav tias yog?

Video: Vim li cas heterospory thiaj suav tias yog?

Video: Vim li cas heterospory thiaj suav tias yog?
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Heterospory yog ib qho tshwm sim uas ob hom spores tau yug los ntawm tib tsob nroj. Cov spores no txawv ntawm qhov loj. Qhov me me yog hu ua microspore thiab qhov loj dua yog hu ua megaspore. … Heterospory yog li no suav tias yog kauj ruam tseem ceeb hauv kev hloov pauv vim nws yog qhov ua ntej rau cov noob cwj pwm

Vim li cas heterospory suav tias yog qhov yuav tsum tau ua ua ntej rau kev hloov pauv ntawm cov noob?

Lub caij nyoog ntawm kev ciaj sia ntawm gametophyte ywj pheej tsawg heev. Yuav kom kov yeej qhov teeb meem no, tus poj niam gametophyte tau khaws cia mus tas li hauv megasporangium. Yog li, qhov mob heterosporous yog suav tias yog qhov ua ntej rau cov noob nyob.

Vim li cas heterospory tseem ceeb?

Heterospory yog qhov zoo nyob rau hauv uas muaj ob hom spores nce qhov zoo li cov nroj tsuag yuav ua tiav cov xeeb ntxwv Heterosporous spores tuaj yeem teb nws tus kheej rau kev xaiv los ntawm ecological tej yam kev mob txhawm rau ntxiv dag zog rau txiv neej thiab poj niam deev luag poj luag txiv.

heterospory yog dab tsi thiab muab nws qhov tseem ceeb?

Hint: Heterospory yog kev tsim cov spores ntawm ob qhov sib txawv thiab kev sib deev los ntawm sporophytes ntawm cov nroj tsuag hauv avQhov me ntawm cov no yog microspore yog txiv neej thiab loj megaspore yog poj niam. Cov lus teb tiav: … - Cov microsporangium muaj microspores whereas mega sporangia muaj megaspores hauv lawv.

Nyob hauv tsob nroj twg yog heterospory tam sim no?

Heterospory txhais tau tias tsim ntawm ob qhov sib txawv sib txawv. Qhov me me, tsim los ua microspore tom qab ua rau cov txiv neej gametophyte thiab qhov loj dua hu ua megaspore ua rau poj niam gametophyte. Heterospory feem ntau tshwm sim hauv tag nrho cov gymnosperms thiab qee yam pteridophytes xws li Selaginella

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