Final answer:
The main function of a vacuole in a cell is to store substances such as water and nutrients, maintain osmotic balance, support cell structure, and assist in defense mechanisms.
Step-by-step explanation:
The main function of a vacuole in a cell is to store various substances such as water, ions, and nutrients. It also plays a role in maintaining the osmotic balance of the cell.
Vacuoles are especially prominent in plant cells, where they occupy a large portion of the cell's volume. Plant cell vacuoles help maintain turgor pressure, which provides structural support and helps with plant growth.
In addition to storage and support, vacuoles can also assist in defense mechanisms in some cells. For example, in certain plant cells, vacuoles can contain toxins or pigments that can deter predators.
Learn more about Function of a vacuole in a cell