Single-celled animals living in fresh water contain a vacuole that repeatedly contracts to expel surplus water. Single-celled plants living in fresh water do not possess an equivalent vacuole. Which statement gives the reason these animals require this vacuole but plants do not?
- APlant cell cytoplasm and animal cell cytoplasm both have a lower water potential than fresh water.
- BPlant cell sap has the same water potential as fresh water, animal cytoplasm has a lower water potential than fresh water.
- CPlant cell walls are impermeable to water, animal cell surface membranes are permeable to water.
- DPlant cell walls restrict the entry of water, animal cell membranes allow the entry of water.