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In botany Cheap Nikita Kucherov Hoodie , the sclerenchyma is a supporting tissue of some plants composed of cells dead at maturity, which are thickened secondary walls are so thick and hard. Its name comes from the Greek escleros , "hard" and enchyma , "substance".

ial organization as a national, state or province. However, the term is most commonly used without reference to specific criteria. The IUCN designates not normally, but can use in their scientific discussions. 1


The concept of rarity is set to have a very small number of individuals Cheap Victor Hedman Shirt , usually below 10,000, but the concept is also influenced by having a very narrow geographic distribution of endemism and or fragmentation of habitat . 2


A species may be threatened or vulnerable, but not considered rare if, for example., Have a large population Cheap Jake Dotchin Shirt , dispersed, but their number declines rapidly or is predicted that. Rare species are generally considered threatened simply because of their inability to recover small population of events stochastic and the potential for rapid decline of its population.


A spike is a type of inflorescence racemose in which the shaft or rachis is elongated and the flowers are sessile, reaching younger flowers at the apex of it.


Examples of species that have spike inflorescences are plantain ( Plantago ), pineapple or pineapple ( Ananas ) and gladiolus ( Gladiolus ).


According to the shape and size of the spine can distinguish several different types of spikes. Thus, Ananas , the spike is oblong and the terminal bud is vegetative. In Plantago Cheap Braydon Coburn Shirt , the pin is cylindrical and Gladiolus is statistical.


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