A student used a microscope to observe a wet-mount slide of red onion epidermal cells that were suspended in a 1%
NaCl solution. The student then added a 15% NaCl solution to the slide and observed the changes that occurred.
The student's observations are represented in Figure 1.
NaCl solut
Original
Wet-Mount Slide
After Adding
15% NaCI
Figure 1. Student's observations of onion cells
Which of the following most directly explains the changes in the cells?
(A) The degradation of DNA in the nuclei of the cells
(B) The lysis of chloroplasts in the cells
(C) The movement of water from the central vacuoles of the cells into the solution
(D) The movement of NaCl from the solution into the cytoplasm of the cells