Why do plants possess large sized vacuole? What is the importance of cell sap present invacuoles of plant cell?

Plants possess large sized vacuoles for several reasons:

1. Storage: Vacuoles are used to store water, nutrients, and waste products. In plants, they can take up to 80% of the cell's volume, providing turgor pressure against the cell wall. This helps the plant maintain its shape and size.

2. Growth: The large vacuole in a plant cell helps in the growth of the plant. It does this by absorbing water and causing the cell to expand. Without this expansion, plant growth would be limited.

3. Regulation: Vacuoles also play a role in regulating the cell's pH and controlling the cell's osmotic pressure.

The cell sap present in vacuoles of plant cells is also important for several reasons:

1. Nutrient Storage: Cell sap is a fluid that is rich in nutrients and other substances. It acts as a reservoir for the plant, storing important nutrients that the plant can use when needed.

2. Waste Disposal: Cell sap also helps in the disposal of waste products. The waste products are stored in the vacuole and later disposed of.

3. Turgor Pressure: The water in the cell sap helps to maintain turgor pressure in the cell. This is important for maintaining the structure and shape of the plant.

4. pH Regulation: Cell sap also helps in maintaining the pH of the cell. It does this by storing and neutralizing various substances that could alter the cell's pH.