Multicellularity is achieved in plants by sharing cell walls. Cell wall formation in plants 4. Tissues are collections of specialized cells that perform a common function. Most algae have no such specialization of cells, all cells are alike. Plant tissues are produced from meristems.
Development is the process of making a multicellular organism from a single cell.
B. All of this development results from the activity of meristems. Animals do not have meristems. In plants, most meristems are apical. The young plant has a root apical meristem and a shoot apical meristem. As the root or shoot system branches, so does the meristem.