Aplant cell remains unchanged in shape or size when it is kept in a solution. what kind of solution is it? a) distilled water b) isotonic solution c) hypotonic solution d) hypertonic solution

The right option is; B) isotonic solution

The solution is an isotonic solution.

An isotonic solution is a solution that has the same dissolved solute concentration, as another solution. When a plant cell is kept in an isotonic solution, the movement of water into the cell is balanced (equal) by movement of water out of the cell. The effect of the water movement between the two solutions is zero, therefore, the plant cell will not be affected in any way and will remain unchanged in shape and size.

oxygen +1 most likely

geologic time scale (for gradpoint) =)