Archegonium: Facts, Discussion Forum, and Encyclopedia Article

Archegonium

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	Archegonium
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	Topics Archegonium Topic Home An archegonium (pl: archegonia), from the ancient GreekAncient Greek Ancient Greek refers to the dialects of the Hellenic language family from about 1100 B.C to 600 A.D., including during the h... a??? (beginning) and ????? (offspring), is a multicellular structure or organ of the gametophyteGametophyte In plants that undergo alternation of generations, a gametophyte is the structure, or phase of life, that contains only half... phase of certain plantPlant Plants are a major group of living things including familiar organisms such as trees, flowers, herbs, ferns, and mosses.... s producing and containing the ovumOvum An ovum is a haploid female reproductive cell or gamete.... or female gameteGamete Gametes, from the ancient Greek ?aet?? , are the specialized germ cells that come together during fertilization in orga... . The archegonium has a long neck and a swollen base. Archegonia are typically located on the surface of the plant thallusThallus (tissue) Thallus, from Latinized Greek θαλλος, meaning a green shoot or twig, is an ... , although in the horned liverwortsHornwort Hornworts are a group of bryophytes, or non-vascular plants, comprising the division Anthocerotophyta.... they are embedded. They are also much-reduced and embedded in the megagametophytes of gymnospermFacts About Gymnosperm Gymnosperms are a group of seed-bearing plants which bear seeds on cone-like structures rather than inside fruit like angios... s. The term is not used for angiosperms or the gnetophytes GnetumGnetum *Gnetum* is a genus of about 30-35 species of gymnosperms, the sole genus in the family Gnetaceae and order Gneta... and WelwitschiaWelwitschia Summary *Welwitschia* is a monotypic genus of gymnosperm plant, comprising the very distinct Welwitschia mirabilis.... because the megagametophyte is reduced to just a few cells, one of which differentiates into the egg cell. The function of surrounding the gamete is assumed in large part by diploid cells of the megasporangium inside the ovuleOvule An ovule is a structure found in seed plants that develops into a seed after fertilization.... . Gymnosperms have their archegonium formed after pollinationPollination Pollination is an important step in the reproduction of seed plants: the transfer of pollen grains to the plant carpel, the ... inside female pine cones (megastrobili). The corresponding male organ is called the antheridiumAntheridium An antheridium is a structure or organ of the gametophyte phase of certain plants producing and containing the spermatids or... .