单词 megasporangium 释义 BETA

Examples ofmegasporangium

Dictionary> Examples ofmegasporangiummegasporangiumisn’t in the Cambridge Dictionary yet. You can help!Add a definitionThe enclosure of themegasporangiumin the integument would additionally not only provide protection against herbivory, it would provide protection against desiccation as well.From theCambridge English CorpusFig. 3o) there is a tear-drop shaped scar along most of the pedicel, which is assumed to be the attachment scar of themegasporangium.From theCambridge English CorpusIt has partially developed vessels as found in the angiosperms, and themegasporangiumis covered by three envelopes, like the ovary structure of angiosperm flowers.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.The remnants of themegasporangiumtissue (the nucellus) surround the megagametophyte.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.It is structurally and functionally equivalent to themegasporangium.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.The ovule initially consists of a stalked, integumented "megasporangium".FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.Megaspores develop within themegasporangium; typically one of the four spores produced by meiosis gains bulk at the expense of the remaining three, which disappear.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.In these the microgametophyte is reduced to pollen and the megagametophyte remains inside themegasporangium, attached to the parent plant.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.Themegasporangiumbears an unopened distal extension protruding above the multilobed integument.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.Themegasporangiumbears an unopened distal extension protruding above the mutlilobed integument.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.Themegasporangiumhas a multilobed integument, and there is an extension on themegasporangiumthat suggests an adaptation to wind pollination.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.This might, through fusion between lobes and between the structure and themegasporangium, have produced an integument.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.One kind, themegasporangium, produces only a single large spore (a megaspore).FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.The megagametophyte develops within the megaspore of extant seedless vascular plants and within themegasporangiumin a cone or flower in seed plants.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.Amegasporangiuminvested in protective layer called an integument is known as an ovule.FromWikipediaThis example is from Wikipedia and may be reused under a CC BY-SA license.

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