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Topic: Archegonium

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	Bryophyta - LoveToKnow 1911
		Archegonium ready for fertilization; a passage leads the form of a narrow flask with a long neck.
		Each antheridium or archegonium arises from a single cell, and while the mature structure is similar in the two groups, the development presents differences in liverworts and mosses.
		Fertilization is effected by the passage of a spermatozoid, attracted probably by means of a chemical stimulus, down the passage of the archegonial neck and its fusion with the ovum.
	www.1911encyclopedia.org /Bryophyta (11068 words)

	Lab 2 :: Fungi, Lichens, Bryophytes and Ferns
		The Archegonium and Antheridium reside on the underside of this gametophyte (n).
		Both the Archegonium (female) and the Antheridium (male) can be found on the underside of the leaf.
		Sperm (n) from the Antheridium uses flagella to swim through water to an egg (n) in the Archegonium and then proceeds to fertilize the egg, producing a zygote (2n).
	www.unlv.edu /faculty/lstark/bio197lab/lab2.htm (1355 words)

	BIO 5 GENERAL BIOLOGY
		The narrow neck of the flask-shaped archegonium is visible on the left.
		The zygote is located in the archegonium (where the egg was) and when it begins to undergo mitosis, a 2N mass of cells, the embryo or immature sporophyte, is formed.
		The sperm swim to the archegonium in a film of water and fuse with the egg to produce a zygote.
	www.csus.edu /indiv/r/reihmanm/ferns_and_fern_allies.htm (1523 words)

	Archegonium - Wikipedia, the free encyclopedia
		An archegonium (pl: archegonia), from the ancient Greek αρχη (beginning) and γονος (offspring), is a multicellular structure or organ of the gametophyte phase of certain plants producing and containing the ovum or female gamete.
		The archegonium has a long neck and a swollen base.
		Archegonia are typically located on the surface of the plant thallus, although in the horned liverworts they are embedded.
	en.wikipedia.org /wiki/Archegonium (154 words)

	[No title]
		This archegonium has been recently fertilized and is at about the 64 celled stage.
		Lycophyta, Lycopodiales, gametophyte, archegonium, embryogenesis 32 Lab07 16-045 16-045t.jpg 16-045v.jpg 120 16-045h.jpg 2027 Lycopodium gametophyte with mature archegonia showing the axial row in the archegonial neck, ventral canal cell and interior egg cell.
		Lycophyta, Lycopodiales, gametophyte, archegonium 33 Lab07 16-043 16-043t.jpg 16-043v.jpg 209 16-043h.jpg 1658 Lycopodium embryogenesis shows a high diversity of different embryogenetic pathways, which is presumed to be a primitive characteristic.
	images.botany.org /set-16/backup/database0403101743.txt (8525 words)

	Government Museum Chennai
		Each archegonium is a flask-shaped structure, provided with a multi cellular stalk at the base.
		The neck of the archegonium is very long and there are many neck canal cells.
		Inside the archegonium and situated in the centre, is the egg (or) ovum.
	www.chennaimuseum.org /draft/gallery/05/01/botany14.htm (466 words)

	Lecture 10
		The zygote divides by mitosis to form the multicellular sporophyte, which grows out of the archegonium, but remains dependent on the gametophyte.
		One of the sperms trapped in the gelatinous material around the archegonium enters and fertilizes the egg, producing a 2 N zygote.
		The zygote divides by mitosis to produce a developing sporophyte embryo, protected by a structure derived from the archegonium call the calyptra.
	nas.cl.uh.edu /novotny/pah10.htm (1562 words)

	Bryophytes
		After fertilization, the sporophyte grows out of the archegonium, and nutrients for the developing sporophyte are provided by the gametophyte.
		The sporophyte consists of a foot, anchored in the archegonium, a seta, or stalk, which elevates the sporangium, or capsule.
		The sporophyte is a simple club-shaped sporangium which grows from a basal foot embedded in the archegonium.
	scidiv.bcc.ctc.edu /rkr/Botany110/lectures/bryophytes.html (846 words)

	Mosses and Liverworts in Wales: Archegonia
		Above the egg cell run a line of canal cells, enclosed by a single layer of neck cells.
		When the archegonium is mature, the canal cells disintegrate leaving a mucus-like substance through which the male antherozoids (released from antheridia) swim to reach the egg cell.
		Successful fertilisation leads to the formation of the sporophyte generation - consisting of a spore-bearing capsule and its seta which remain attached to the parent gametophyte plant.
	home.clara.net /adhale/bryos/archegon.htm (101 words)

	BRYOPHYTES AND FERNS (Site not responding. Last check: 2007-08-04)
		The antheridia produce flagellated sperm that swim to the archegonia and fertilize the eggs to form the diploid (2N) zygote.
		The zygote eventually develops into a mature sporophyte that remains attached to the archegonium on the undersurface of the archegoniophore.
		The archegonia can be identified as the dark spots near the "notch of the heart," however, the antheridia, which develop near the point of the heart, may not be identifiable.
	www.usd.edu /biol/labs/101/bryo01.htm (2605 words)

	Untitled Document
		The megagametophyte develops inside the nucellus and eventually produces an archegonium which is composed of just a few cells, one of which is the egg cell..
		The male cone produces pollen sacs (microsporangia) and meiosis (of the microsporocyte) produces a tetrad of microspores which mature into pollen grains.
		Fertilization occurs when the sperm nucleus migrates down the pollen tube into the archegonium and finally fuses with the egg nucleus.
	www.science.siu.edu /landplants/Coniferophyta/Pine.LC.html (538 words)

	Amazon.com: Archegonium: Books (Site not responding. Last check: 2007-08-04)
		The archegonium of MÌ²nÌ²iÌ²uÌ²mÌ² cÌ²uÌ²sÌ²pÌ²iÌ²dÌ²aÌ²tÌ²uÌ²mÌ² (Botanical Gazette) by George Mellinger Holferty (Unknown Binding - 1904)
		Archegonium i Sperm Egg haploid (n) diploid (2n) b Zyglote (growth...
		Bryophyte eggs are produced by the female gametangia: the archegonium.
	www.amazon.com /s?ie=UTF8&keywords=Archegonium&tag=httpexplaguid-20&index=books&link_code=qs&page=1 (881 words)

	Spore production in two common Bryophytes
		retention of the zygote and developing embryo within the archegonium on the female sporophyte
		While many do have water conducting tissues, these are not lignified, and are thus not xylem and phloem.
		After fertilization of the haploid egg within the archegonium by the flagellated sperm, the diploid zygote then undergoes mitosis to form a multicellular, diploid sporophyte.
	www.users.muohio.edu /smithhn/brianwebpage.htm (424 words)

	Bryopsids
		The archegonium exudes a chemical that attracts sperms cells that swim down the neck to the egg.
		Finally, the growth of the sporophyte outpaces that of the expanding archegonium and the archegonium splits into a top and bottom piece.
		The top part of the old archegonium covers the sporangium until close to maturity and is called the calyptra.
	userwww.sfsu.edu /~biol240/labs/lab_11nonseedplants/pages/bryopsids.html (631 words)

	Mosses and Ferns
		Plants grow by mitosis, and reproduce by meiosis and alternation of generations with special adaptations of the gametes and embryos to survive in a non-aquatic environment.
		The male gametangium is called an antheridium (anthe = flower), while the female gametangium is an archegonium (arche = first, beginning; goni = seed).
		The eggs are fertilized within the female archegonium to reduce desiccation, and often stay within the archegonium to continue their development.
	biology.clc.uc.edu /courses/bio106/mosses.htm (923 words)

	Bryophytes - introduction
		The gametophytes (which are the stage of the life cycle we recognise as the moss or liverwort) bear male sex organs termed antheridia (antheridium sing.
		Flask-like archegonium (A) with single egg cell (B) at base of canal.
		Some chemical exuded by the egg cell attracts the sperm which swims down the neck of the archegonium and fertilises the egg.
	users.sunbeach.net /users/cmsc/bryo1.htm (598 words)

	archegonium - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "archegonium" is defined.
		archegonium : The American Heritage® Dictionary of the English Language [home, info]
		Archegonium : Online Plain Text English Dictionary [home, info]
	www.onelook.com /?w=archegonium (171 words)

	Practice Questions Dec (Site not responding. Last check: 2007-08-04)
		Near the end of class, I tried to squish a cladogram on one panel of the board, and ended up writing some letters up in the shadows.
		The fern archegonium produces an egg by meiosis_____
		The brownish/orange-ish slightly fuzzy spots on the undersides of fern fronds are producing pollen grains_____
	www.eeb.uconn.edu /courses/bio108/Bio108f00/QDec6.html (363 words)

	Basal plants (Site not responding. Last check: 2007-08-04)
		Plants, excluding the green algae, have the following synapomorphies: 1) alternation of generations lifecycle, 2) apical cell growth, 3) cuticle, 4) antheridium (male reproductive), and 5) archegonium (female reproductive).
		Land plants are multicellular eukaryotic organisms that are autotrophic (produce their own food by photosynthesis), possess chlorophyll, and have cell walls containing cellulose.
		Characteristics that distinguish land plants from the other Chlorobionta are parenchyma, apical cell growth, cuticle, antheridium, and archegonium.
	www.usd.edu /biol/labs/162/DiversityLabs/02Basalplants.html (2951 words)

	[No title]
		Archegonia range from maturity (see egg cell on the left), to quite imature stages." "Bryophyta, Bryales, archegonia" 3 Lab02 16-103 16-103t.jpg 16-103v.jpg 129 16-103h.jpg 715 "Mnium archegonium.
		Note ventral canal cell in the right archegonium." "Bryophyta, Bryales, archegonia, gametophyte, moss" 4.01 Lab02 16-386 mnium-egg-redo-t.jpg mnium-egg-redo-v.jpg 82 mnium-egg-redo-h.jpg 228 Mnium archegonium containing a receptive egg cell as viewed using differential interference contrast microscopy.
		Of what advantage would this strategy be?" "Bryophyta, Marchantiales, archegonia" 8 Lab02 16-099 16-099t.jpg 16-099v.jpg 220 16-099h.jpg 442 "Marchantia mature archegonium.
	images.botany.org /set-16/backup/database0403091318.txt (7054 words)

	Archegonium (Site not responding. Last check: 2007-08-04)
		Note how leaves and hairs bend up and over the archegonia.
		This arrangement helps to trap splash droplets and to prevent dehydration between rain storms.The archegonium is bottle shaped and produces a single egg (see figure 6 and label 2 above) near the base of the structure.
		The neck of the archegonium remains closed until the egg is ready for fertilization.
	www.jburroughs.org /science/resources/moss/archegonium.html (93 words)

	Review of Algae, Bryophytes, Pteridophytes- Common Links between each groupof Plants
		The algae can be described as non-vascular, non-embryophytic plants; meaning that they lack xylem, phloem and perhaps most importantly, an archegonium.
		Within the green algae, there is a class called the Charophyceae which is believed to be closely related to the embryophytes because they tend to be oogamous and have phragmoplastic cell division which are also traits found in the embryophytes.
		Two genera, Chara and Coleochaete are thought to be particularly close in relation to an embryophyte common ancestor, because they have other features one might find in a ancestor to the embryophytes: tissues which can be Parenchymatous, and a pseudo-archegonium; which functions similarly to a true archegonium, yet lacks features found in true archegonia.
	instruct1.cit.cornell.edu /courses/biopl241/real.html (675 words)

	Archegonium-1
		Archegonium in which the Neck Canal Cells have undergone Autolysis.
		An Archegonium as seen by an incoming Sperm.
		It needs to make its way into the narrow opening of the
	www.biologie.uni-hamburg.de /b-online/library/webb/BOT201/AntherArch/Archegonium1.htm (159 words)

	Biological Foundations 112, Lecture 26
		The zygote develops into a multicellular embryo within the archegonium
		(1) Grows out of and attached to the venter of the archegonium
		and other objects toward the archegonium and egg by a
	www.puc.edu /Faculty/Gilbert_Muth/botlec26.htm (441 words)

	archegonium - Dictionnaire Français-Anglais WordReference.com
		We found no English translation for 'archegonium' in our French to English Dictionary.
		Or did you want to translate 'archegonium' from English to French?
		Forum discussions with the word(s) 'archegonium' in the title:
	www.wordreference.com /fren/archegonium (41 words)

	Archegonium - Wikipedia
		Im verdickten Teil befindet sich eine einzige Zentralzelle, welche sich kurz vor der Reife in die Eizelle und eine Bauchkanalzelle teilt.
		Bei der Reife des Archegoniums öffnet es sich durch ein Aufquellen der obersten Wandzellen, dadurch wird die Cuticula zerrissen.
		Durch die Öffnung entsteht ein für die Spermatozoide passierbarer Kanal zur Eizelle.
	de.wikipedia.org /wiki/Archegonium (108 words)

	OEDILF - Word Lookup
		All the way to the cathode we'll slide."
		An archegonium is a moss or liverwort "womb" with an egg inside at the bottom of a long tube.
		When fertilization time comes, the protecting tissue of the tube melts into a liquid and the antherozoids race to get to the egg first.
	www.oedilf.com /db/Lim.php?Word=archegonium (167 words)

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