antheridia and archegonia

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Division Lycophyta
... plants are commonly known as the lower ferns and possess true vascularized stems, leaves and roots. The position and microanatomy of the vascular tissue is characteristic of ... and extinct forms known. The Order possesses one type of spore (homosporous) from which one gametophyte produces antheridia and archegonia and the sperm cells possess two flagella. Primary growth, dichotomous branching, and ...
home.manhattan.edu

Bryophytes
... archegonia and the antheridia are elevated above their respective thallus structures on stalks called archegoniophores and antheridiophores. Several archegonia and antheridia are found in each stalk. Other thallose liverworts will have the antheridia and archegonia ...
scidiv.bcc.ctc.edu

Fern Allies
... with a fungus and some species of Lycopodium have lost their photosynthetic capacity and rely on the fungus to provide carbohydrate! The gametophyte bears antheridia and archegonia and motile sperm cells swim to the eggs to fertilize these. The young sporophyte, as for ferns, develops initially as a parasite on the gametophyte. A = antheridia B = archegonia ...
scitec.uwichill.edu.bb

Mosses and Liverworts
... and Liverworts (Bryophyta) Mosses and liverworts are traditionally classified together in the Division Bryophyta on the basis of their sharing: a similar life cycle (alternation of generations) similar reproductive organs (antheridia and archegonia) lack of vascular tissue (xylem and phloem) Some 23,000 species of living mosses and liverworts have been ...
users.rcn.com

t
... and sporeling is initially parasitic and dependent on the gametophye, but rapidly develops roots of its own and becomes an independent photosynthetic plant as the prothallus withers and dies. Antheridia and archegonia ...
www.anbg.gov.au

Fern notes
... bears the rhizoids, antheridia and archegonia. They are homothallic. Archegonia are borne near the notch. The antheridia tend to be nearer the apex. Antheridia are formed first, and are small - consisting of only 3 or 4 sterile jacket cells surrounding 32 sperm. Archegonia ...
www.cs.cuc.edu

The Succulent Plant Page: Glossary of Botanical Terms
... is farmed and exported from several countries including Colombia, Honduras, Israel, Mexico and Nicaragua and is sometimes available in European and USA supermarkets. Placentation - arrangement and attachment of ... of a spore which for the purpose of sexual reproduction produces the antheridia and archegonia. Prostrate - lying flat upon the ground. Protein - a large biological macromolecule made ...
www.succulent-plant.com

Home Page
... bryophyte gametophytes include: gemmae and rhizoids Reproductive features common among bryophyte gametophytes include: antheridia and archegonia. Vegetative Features Common to ... and smooth rhizoids in the Marchantiales click image to enlarge Branched rhizoids of a moss click image to enlarge Protonemata Bryidae protonemata click image to enlarge Antheridia and Associated Structures Archegonia and ...
una.edu

Mosses and Liverworts in Wales: Antheridia
... antheridia, and in suitable damp conditions, these are released and give rise to antherozoids - motile male gametes. These always require a film of water in which to "swim" to the female archegonia ...
home.clara.net

Mosses and liverworts, simple plants?
... break away and germinate to become new plants. Especially liverworts do this. The normal, sexual method of reproduction however, involves special organs, the antheridia and the archegonia. These ... archegonia and antheridia are often found in special cups of leaves. paraphysis with archegonium I always try to study first some of the common microscopical objects in detail, especially their biology and ...
www.microscopy-uk.org.uk

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