SAT Subject Biology Practice Question 192: Answer and Explanation
2. Which cellular process is responsible for the change shown below?
A. Closing of stomata
B. Slowing of photosynthesis
C. Reduction in protein synthesis
D. Degradation of the cytoskeleton
E. Decreased pressure in the vacuole
Correct Answer: E
Wilting of plants is caused by decreased turgor pressure due to a lack of water in the central vacuole. Uptake of water by the vacuole causes it to expand and exert pressure on the cell wall.