The rate of photosynthesis will often increase in a situation where there is less water within a plant cell than outside of it.
Osmosis will cause water to exit a plant cell if the solution around it has a lower concentration of molecules than the solutions inside it, causing the plant cell to become flaccid (soft). The solutions is diluted to the plant cells if the concentration of solutes outside of the cell is less than within the cell and the liquids cannot pass the membrane. If a cell is submerged in an isotonic environment, there won't be any net water inflow or outflow, and the volume of the cell will stay constant. A hypertonic solution is one where the solute concentration of the solution outside of the cell is lower than that of the cellular fluids.
(3. When there is a lower concentration of water outside of a plant cell rather than inside a plant cell, the plant will tend to —
A: grow toward the sun
B: lose water and wilt
C: gain water and become rigid
D: increase its rate of photosynthesis)
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