Here's why:
* Contractile Vacuoles: These are structures that help single-celled organisms like paramecia regulate their water balance. They collect excess water from the cytoplasm and expel it to the environment. This is crucial for paramecia living in freshwater environments, as they constantly take in water due to osmosis.
* Plant Cells: Plant cells have a rigid cell wall that prevents them from bursting due to excessive water intake. They also have a different mechanism for regulating water balance using vacuoles that store water and other substances.
Let me know if you'd like to know more about other organelles!
