Explanation:

Meristem is a type of tissue system in plants, composed of a mass of undifferentiated cells and their primary function is to take part in the growth of plants. Permanent tissues are differentiated tissues doing specific functions such as conduction, providing mechanical support or carrying out photosynthesis etc.Meristematic tissues are responsible for the primary and secondary growth of the plants whereas permanent tissue is responsible for various growths. Meristematic tissue has dense cytoplasm with prominent nucleus whereas permanent tissue has thin cytoplasm with normal nucleus.