Wes places red blood cells in a petri dish with pure water and observes them
under a microscope. He drew a model to illustrate his observations.
What is the most likely explanation for Wes's observations?
a. The red blood cells were placed into an isotonic solution. Water moved into
and out of the cells to maintain homeostasis.
b. The red blood cells were placed into an isotonic solution. Water moved into
the cells until the cells burst.
c. The red blood cells were placed in a hypertonic solution. Water moved from
the inside of the cells to the outside of the cells to maintain homeostasis.
d. The red blood cells were placed in a hypotonic solution. Water moved from
the outside of the cells to the inside of the cells until the cells burst.