What are the two main functions of sclereids or stone cells and are sclereids alive at maturity?

Explanation:

A sclereid is a type of sclerenchyma (a plant cell type characterized by having a thick and lignified cell wall) of varying shapes that are typically shorter, with an extremely thick cell wall and whose function is to provide strength and support primarily. Sclereids are also responsible for the gritty texture of pears and guavas.

They are non-living at maturity as they don't require further maintenance, but they maintain the structure.

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chinese civil war took place over a long period of time between 1927 and 1950. the war was interrupted when japan invaded china in 1936 and by world war ii. the war was fought between the nationalist government of china, also called the kuomintang (kmt), and the communist party of china (cpc).