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Ymnosperms. They are much-reduced and embedded in the megagametophytes of gymnosperms. The term is not used for angiosperms or the gnetophytes gnetum and welwitschia because the megagametophyte is reduced to just a few cells, one of which differentiates into the egg cell. |
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Answer» egonium (pl: archegonia), from the ancient Greek , is a multicellular structure or organ of the gametophyte phase of certain plants, producing and containing the ovum or female gamete. The corresponding male organ is called the antheridium. The archegonium has a long neck canal or venter and a SWOLLEN base. Archegonia are TYPICALLY located on the SURFACE of the PLANT thallus, although in the HORNWORTS they are embedded |
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