For 10 points, name these undifferentiated regions in plants where growth occurs.
Unlike determinate ones, indeterminate rhizobial nodules maintain an active one of these structures. Negative feedback between CLAVATA and WUSCHEL genes maintains an important cell population in a type of these regions. A type of these structures has a two-layer tunica-corpus organization in most (*) angiosperms. Cells in these regions have small vacuoles and rudimentary plastids. The cambium has a lateral type of this tissue, while shoot or root tips contain the apical type. For 10 points, name these undifferentiated regions in plants where growth occurs.
Unlike determinate ones, indeterminate rhizobial nodules maintain an active one of these structures.
meristems [accept any specific kind of meristem; prompt on roots, shoots, or cambium]