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词条„megagametophyte“在英语 » 德语中的译文 (跳至 德语 » 英语)
megagametophyte [ˌmeɡəɡæmiˈtəʊˌfaɪt], embryo sac 名词
单语范例（未经PONS编辑处理）
英语
- The megagametophyte develops within the megaspore of extant seedless vascular plants and within the megasporangium in a cone or flower in seed plants.en.wikipedia.org
- The megaspore that remains divides mitotically and develops into the female gametophyte (megagametophyte) which eventually produces one or more eggs.en.wikipedia.org
- This type of megagametophyte develops from the megaspore through three rounds of mitotic divisions.en.wikipedia.org
- In angiosperms, the megagametophyte is reduced to only a few nuclei and cells, and is sometimes called the embryo sac.en.wikipedia.org
- Then, the megagametophyte is contained within a waterproof integument, which forms the bulk of the seed.en.wikipedia.org
- In flowering plants, the megagametophyte (also referred to as the embryo sac) is much smaller and typically consists of only seven cells and eight nuclei.en.wikipedia.org
- In gymnosperms, the megagametophyte consists of around 2000 nuclei and forms archegonia, which produce egg cells for fertilization.en.wikipedia.org
- An archegonium develops within the megagametophyte and produces an egg.en.wikipedia.org
- The female gametophytespecifically termed a megagametophyte is also called the embryo sac in angiosperms.en.wikipedia.org
- The megagametophyte produces an egg cell (or several egg cells in some groups) for the purpose of fertilization.en.wikipedia.org
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