pollen embryo sac 中文意思是什麼
pollen embryo sac
解釋
花粉胚囊-
The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac
胚乳通常是三倍體,由初生胚乳核發育而來,三倍體核來源於花粉管中的雄配子與胚囊中兩個極核的融合。 -
The concept of an alternation of generations can be extended to the flowering plants, in which the embryo sac and pollen represent the much reduced famale and male gametophyte generations respectively
這個概念也可以運用在有花植物上,由胚囊和花粉各自表達雌雄配子體世代。
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