Osmosis and water potential gradient in hypertonic raisins

Steps:

• Raisins have high sugar concentration, lowering their water potential (more negative ψ).
• Pure water has higher water potential (less negative ψ, near zero).
• Water moves via osmosis from higher ψ (less negative) to lower ψ (more negative).
• Thus, water enters the raisin toward its more negative potential.

Why C is correct:

• Water potential inside the raisin is more negative due to solute potential (ψ_s), driving water influx per the osmosis principle that water flows down the ψ gradient.

Why the others are wrong:

• A: Inside ψ is more negative, not less, due to high solutes.
• B: Water moves into, not out of, the raisin.
• D: Outside ψ is less negative, so water does not move out.

Final answer: C