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Pteridophytes, Gymnosperms & Palaeobotany. 5. For free study notes log on: www.gurukpo.com. Unit-I. Pteridophytes. Q1 Stelar system in Pteridophytes? Ans. The entire vascular cylinder of the primary axis of pteridophytes is usually referred to as stele. Besides xylem and phloem, it includes pith (if present) and is.
Nnode and nodus: the characteristic of Pteridophyta,the morphosis and life cycle of pteris's sporophore and gametophytic. Teaching style: teach 2 classes using multimedia .Observe and identify plants in the extracurricular practice. First, Pteridophyta's characteristic. Pteridophyta is also called ferns, belong to vascular plants
(PTERIDOPHYTES). AAlthough ferns and similar seedless vascular plants (reproducing by spores) were formerly lumped together as Division Pteridophyta, they are currently segregated into three (or four) separate divisions (Lycopodiophyta, Equisetophyta, and Polypodiophyta) to reflect the great diversity between these
submerged in water. Yet, dioecious prothalli in a terrestrial environment would be at an even greater disadvantage, for they might never achieve fertilization at all, so long as the antherozoid has to bear the whole responsibility of finding the archegonium. This is where heterospory may operate to the advantage of plants with
1. Figure 1. Above; horsetails and ferns. Below; whisk fern, a desert fern commonly known as the resurrection plant, and club moss. Vascular Non-Seed Plants. (Pteridophytes): Ferns. This group includes ferns and their close relatives: Phylum Pterophyta: ferns 11,000 species. Phylum Psilophyta: whisk ferns 6 species.
The term "Pteridophyte" refers to vascular plants with independent gametophytes and motile sperm that are usually classified into 4 divisions that comprise nearly . here, as a phylogenetic 'hypothesis' based in part on molecular cladistics, suggests fundamental changes in major lineage relationships (see reprint - pdf file).
(PTERIDOPHYTES). Ferns are vascular plants that do not produce seeds. Sexual reproduction is accomplished by the release of spores, which develop in special structures called sporangia (singular: sporangium). The sporangia usually occur in clusters called sori (singular: sorus), found on the underside of “fertile" leaves.
Leaves minute, scalelike and veinless or narrowly linear, with a single vein. 2. Plant dichotomously branched, appearing leafless (the leaves minute scales); sporangia. (synangia) trilobed, trilocular, scattered on branches . Psilotaceae. 2. Plants with a main stem bearing lateral branches, with numerous
This PDF version does not have an ISBN or ISSN and is not therefore effectively published (Melbourne Code, Art. 29.1). The printed version, however, was effectively published on 6 June 2013. Lin, Y. X. et al. [total: 59 authors]. 2013. Pteridophytes [introduction, authors and addresses, systematic list, glossary, and key to
A pteridophyte sensu lato is a vascular plant (with xylem and phloem) that reproduces via spores, and therefore was a member of the former and now invalid taxon Pteridophyta. The term is now used only informally to denominate a fern (monilophyte) or lycophyte. Because pteridophytes produce neither flowers nor seeds,

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March 2018