»Stellar evolution is the process by which a star changes over the course of time. ... Stars with at least half the mass of the Sun can also begin to generate energy through the fusion of helium at their core, whereas more-massive stars can fuse heavier elements along a series of concentric shells.
Protostele»A simple, primitive arrangement of conducting tissues in stems and roots of certain lower plants, consisting of a solid cylinder of xylem surrounded by a layer of phloem
Solenostele»A type of siphonostele, in which the vascular tissue in the stem forms a central cylinder around a pith, with widely spaced leaf gaps
Dictyostele»a stele in which the vascular cylinder is broken up into a longitudinal series or network of vascular strands around a central pith (as in many ferns)
Polycylic Stele»is the most complex one amongst all Pteridophytes. ... Each such stele possesses an internal vascular system connected with an outer siphonostele. Such connections are always found at the node. A typical polycyclic stele possesses two or more concentric rings of vascular tissue
Eustele»a stele typical of dicotyledonous plants that consists of vascular bundles of xylem and phloem strands with parenchymal cells between the bundles.
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What is the Stellar Theory?
»Stellar evolution is the process by which a star changes over the course of time. ... Stars with at least half the mass of the Sun can also begin to generate energy through the fusion of helium at their core, whereas more-massive stars can fuse heavier elements along a series of concentric shells.
Enumerate and characterized the different types of steles
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