Meristematic tissues are the tissues which are capable to divide. They are active cells which are undifferentiated cells. They have abundant cytoplasm and a clear nucleus. They add cells and contributes in the growth. For example, apical meristematic tissue.
Permanent tissues are the tissues which are specialized and have lost the capacity to divide. They are differentiated cells which has specific function. They have less cytoplasm as compared to meristematic tissues. For example, parenchyma cells.