Introduction:
Meristematic tissues are the actively dividing and undifferentiated cells found in plants. They are responsible for the growth and development of plants. These tissues have unique characteristics that differentiate them from other plant tissues. One such characteristic is the absence of vacuoles in meristematic tissues.

Explanation:

1. Definition of Vacuole:
A vacuole is a membrane-bound organelle present in the cells of plants and some other organisms. It is filled with cell sap, which is a watery fluid containing various substances like ions, sugars, pigments, and waste materials.

2. Function of Vacuole:
Vacuoles play several important roles in plant cells, including:
- Storage of water and nutrients
- Maintenance of turgidity and cell shape
- Regulation of osmotic pressure
- Detoxification of harmful substances
- Breakdown of unwanted molecules

3. Characteristics of Meristematic Tissues:
Meristematic tissues are characterized by their ability to divide and differentiate into various specialized cell types. They are responsible for the growth of plants in length and width. These tissues have the following features:
- Rapid cell division
- Small and densely packed cells
- Thin cell walls
- Large nuclei and dense cytoplasm
- Absence of vacuoles
- Lack of differentiation

4. Reasons for the Absence of Vacuoles:
There are several reasons why meristematic tissues do not have vacuoles:
- Active cell division: Meristematic tissues are actively dividing, and the absence of vacuoles allows for more space and flexibility during cell division.
- Cell expansion: Vacuoles occupy a significant amount of space within a cell. In meristematic tissues, where cell expansion is minimal, the absence of vacuoles ensures that the cells remain small and densely packed.
- Metabolic activity: Meristematic tissues have a high metabolic rate, and the absence of vacuoles allows for efficient exchange of materials within the cells.
- Differentiation: Vacuoles are typically formed during the process of cell differentiation. Since meristematic tissues are undifferentiated, they do not require the storage and regulatory functions of vacuoles.

Conclusion:
Meristematic tissues, being actively dividing and undifferentiated, lack vacuoles. This absence allows for efficient cell division, metabolic activity, and small cell size. As the cells differentiate and mature, vacuoles are formed to fulfill various functions in different plant tissues.

Meristamatic tissue is a type of living tissue. It is found in plants they are of 3 types apical meristum, lateral meristum and capalary meristum.. Main function of Meristamatic tissue is to multiply rapidly to give the plant a certain hight width hence they don't need any vacholes