| http://www.w3.org/ns/prov#value | - are made up of innumerable cells, each consisting of a thin membranous wall inclosing a semifluid mass, in which lies the nucleus or center of cell activity and minute grains of starch or other material which the plant has elaborated.<br><br>The whole framework of the very young plants is made up of these cell walls, commonly called cellular tissue or cellulose.
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