A Paramecium [par-uh-MEE-see-uhm] lives in fresh water and has a contractile vacuole [Kuhn-TRAK-tl VAK-yoo-ohl] that allows it to regularly expel excess water that enters its cell. Which of the following is correct?

W) The inside of the cell is hypertonic compared to the outside of the cell, so water enters the cell through osmosis

X) The inside of the cell is hypotonic to the outside of the cell, so water enters the cell through osmosis

Y) The inside and outside of the cell are isotonic, but water enters the cell as the Paramecium swims around

Z) The cellular processes of the Paramecium produce a lot of excess water, so it needs to get rid of the extra water
X) THE INSIDE OF THE CELL IS HYPOTONIC TO THE OUTSIDE OF THE CELL, SO WATER ENTERS THE CELL THROUGH OSMOSIS