Telome theory pdf file download

Some of the merits and demerits of telome theory are as follows. Meaning of telome theroy a telome is defined as the single nerved ultimate terminal portion of a dichotomising axis. The true story seems to be lost in antiquity and perhaps will never. Merits of the telome theory it is outcome 0f a master mind that has portrayed, in a skilful manner the origin and evolution of the saprophytes of. The telome theory, thus, combines phylo genetic research on external shape, on ana tomy stelar theory and on ontogeny. Questions concerning the two competing theories of the development of alternating. The telome theory offers one explanation for the nature of the aerial. Chapter pdf available april 2002 with 15,325 reads how we measure reads a read is counted each time someone views a publication summary such.

It is the point of the most distal dichotomy to the tip of a branch. This is commonly interpreted in terms of the more highly specialized leaves of the leptosporangiate ferns as corn. The dominant theory of leaf evolution is the telome theory zimmermann, 1952, which suggests. Use pdf download to do whatever you like with pdf files on the web and regain control. Free pdf to word converter has been designed to allow users to edit pdf. The interpretation of the plant body as a branched axis with its divisions specialized for various functions, but all like in fundamental structure, is called the telome theory. Cute pdf writer is a customizable tool that exports windowsgenerated files. Content is available under the creative commons attribution share. Elie antoine octave lignier was a french botanist, known for his work in the field of. A number of theories on landplant evolution exists of which the telome theory of walter zimmermann 1930, 1952. The telome theory can be applied to interpret the evolution of a synangium of psilotum.

According to the telome theory, megaphylls evolved from the threedimensional lateral branches of early vascular land plants in a. Free excelto pdf converter allows you to easily convert your excel files to. Zimmermanns telome theory incorporates the same gradualistic assumptions as the modern synthesis and has nurtured and molded thought patterns of. Two theories of origin of the landplant sporophyte. Merits and demerits of telome theory biology 840 words. The telome theory states that the organs, appendages and vascular systems of land plants evolved from simple multicellular modules telomes that have been combined and modified in various ways. Initially, the overtopping occurred in the aerial branch of rhynia type plant to form a pseudomonopodial branching system with laterals having. Pdf for well over 50 years, the telome theory of walter. The telome theory is due to the work of zimmermann. Telome theory free download as powerpoint presentation.

This page was last modified on 26 december 2014, at 03. Telomes, theory change, and the evolution of vascular plants. Web to pdf convert any web pages to highquality pdf files while retaining page layout, images, text and. Some pteridosperm stems and fructifications with particular reference to the medullosae. The overtopping, reduction and syngenesis have combined to produce a synangium of psilotum fig. The connecting axes between dichotomies are called mesomes. The telome theory states that the organs, appendages and vascular systems of land plants evolved from simple multicellular modules telomes that have been.