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within the cell
* Maintaining an acidic internal pH
* Containing small molecules
* Exporting unwanted substances from the cell
* Allowing plants to support structures such as leaves and flowers due to the pressure of the central vacuole
* By increasing in size, allowing the germinating plant or its organs (such as leaves) to grow very quickly and through using up mostly just water.
* In seeds, storing proteins needed for germination (these are kept in 'protein

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