Mica Piro Chapter 35: Plant Structure, Growth, & Development Plants have a hierarchical organization consisting of organs, tissues, and cells (35.1) An organ consists of several types of tissues that together carry out particular functions A tissue is a group of cells, consisting of one or more cell types that together perform a specialized function Vegetative growth (production of leaves, stems, and roots) is only one stage in a plant?s life Most plants undergo growth relating to sexual reproduction In angiosperms, reproductive growth is associated with the production of flowers The 3 Basic Plant Organs: Roots, Stems, and Leaves