Question

unit 1.4 cell transport, homeostasis, feedback quiz 2025
solution a
sugar molecule (solute)
selectively permeable membrane
solution b
solution dropdown is hypertonic; solution dropdown is hypotonic. over time, the water level on side dropdown will go down.

Explanation:

To solve this problem, we analyze the concepts of hypertonic, hypotonic solutions, and osmosis:

Step 1: Define Hypertonic and Hypotonic

A hypertonic solution has a higher solute concentration (more sugar molecules) than another solution. A hypotonic solution has a lower solute concentration (fewer sugar molecules) than another solution. Water moves across a selectively permeable membrane from the hypotonic solution to the hypertonic solution (osmosis).

Step 2: Analyze Solution A and B

• Solution A: Fewer sugar molecules (lower solute concentration).
• Solution B: More sugar molecules (higher solute concentration).

Step 3: Identify Hypertonic, Hypotonic, and Water Movement

• Hypertonic solution: Solution B (higher solute concentration).
• Hypotonic solution: Solution A (lower solute concentration).
• Water movement: Water moves from Solution A (hypotonic) to Solution B (hypertonic). Thus, the water level in Solution A will decrease over time.

Answer:

• Solution $\boldsymbol{B}$ is hypertonic; solution $\boldsymbol{A}$ is hypotonic.
• Over time, the water level on side $\boldsymbol{A}$ will go down.